You pick a card at random. 5 6 7 What is P(7)? Write your answer as a fraction or whole number.

Answers

Answer 1

Probability of getting a 7 when a card is picked randomly is 1/3.

Here, given that

A card is picked at random.

Possible outcomes = {5, 6, 7}

Number of possible outcomes = 3

Favorable outcomes = {7}

Number of favorable outcomes = 1

Probability = Number of favorable outcomes / Total outcomes

                  = 1/3

Hence the required probability is 1/3.

Learn more about Probability here :

https://brainly.com/question/30425801

#SPJ1


Related Questions

Railway Cabooses just paid its annual dividend of $2.50 per share. The company has been reducing the dividends by 11.7 percent each year. How much are you willing to pay today to purchase stock in this company if your required rate of return is 13 percent?

Answers

Based on the information provided, Railway Cabooses paid an annual dividend of $2.50 per share. However, the company has been reducing its dividends by 11.7 percent each year.

To calculate the current annual dividend, we can use the formula: current dividend = previous dividend * (1 - dividend reduction rate).
So, the current annual dividend would be $2.50 * (1 - 0.117) = $2.21 per share. To determine how much you should pay to purchase stock in this company, we need to use the dividend discount model.
The formula for this model is stock price = annual dividend / (required rate of return - dividend growth rate).
Plugging in the values from the problem, we get:
Stock price = $2.21 / (0.13 - 0.117) = $34.15 per share.
Therefore, if your required rate of return is 13 percent, you should be willing to pay $34.15 per share to purchase stock in Railway Cabooses.

for more information on the annual dividends see:

https://brainly.com/question/15871366

#SPJ11

Sketch the graphs of the following equations y=x+5, y=-(x+5) and y=|x+5|

Answers

Answer:

See below

Step-by-step explanation:

determine the equation of the tangent plane to z = ln(2x y) at (1, 3).

Answers

The equation of the tangent plane to z = ln(2x y) at (1, 3) is x + (1/3)y - z + ln(2) + ln(3) = 0.

To find the equation of the tangent plane to the surface z = ln(2xy) at the point (1, 3), we need to find the partial derivatives of z with respect to x and y at (1, 3), which are:

∂z/∂x = 1/x

∂z/∂y = 1/y

Evaluating these partial derivatives at (1, 3), we get:

∂z/∂x(1, 3) = 1/1 = 1

∂z/∂y(1, 3) = 1/3

So the normal vector to the tangent plane at (1, 3) is given by:

N = <1, 1/3, -1>

Now we need to find the constant term in the equation of the plane. To do this, we substitute the coordinates of the point (1, 3) into the equation of the surface:

z = ln(2xy) = ln(2(1)(3)) = ln(6)

So the equation of the tangent plane is:

x + (1/3)(y - 3) - z + ln(6) = 0

Simplifying, we get:

x + (1/3)y - z + ln(2) + ln(3) = 0

So the equation of the tangent plane to the surface z = ln(2xy) at the point (1, 3) is x + (1/3)y - z + ln(2) + ln(3) = 0.

Know more about tangent here:

https://brainly.com/question/10053881

#SPJ11

A cylinder has a base diameter of 6 centimeters and a height of 18 centimeters. What is its volume in cubic centimeters,

Answers

Answer: 508.9380099cm³ or 508.94cm³ (2 decimal places)

Step-by-step explanation:

Volume of a cylinder = [tex]V = \pi r^{2} h[/tex]   (Volume = pi x radius squared x height)

We have the diameter so we half it to get the radius

6 ÷ 2 =3

Then we do [tex]\pi[/tex] x 3² x 18 = 162[tex]\pi[/tex] or 508.9380099

1 decimal places = 508.9

2 decimal places = 508.94

solve the given differential equation. (the form of yp is given.) show your work in clear and concise steps. put a box around your final answer. y'' - y = x2 3 (let yp = ax2 bx c.)

Answers

To solve the differential equation y'' - y = x^2/3 using the given form of yp (yp = ax^2 + bx + c), we first need to find the derivatives of yp.

yp = ax^2 + bx + c
yp' = 2ax + b
yp'' = 2a

Substituting yp, yp', and yp'' into the differential equation gives:

2a - (ax^2 + bx + c) = x^2/3

Simplifying this equation and comparing the coefficients of x^2, x, and the constant term gives:

-a = 1/3
b = 0
2a - c = 0

Solving for a, b, and c, we get:

a = -1/3
b = 0
c = -2a = 2/3

Therefore, the particular solution is yp = -x^2/3 + 2/3.

To find the general solution, we need to add the homogeneous solution, which is the solution to the associated homogeneous equation y'' - y = 0. The characteristic equation for this homogeneous equation is r^2 - 1 = 0, which has roots r = ±1.

Therefore, the general solution is:

y = c1e^x + c2e^-x - x^2/3 + 2/3

where c1 and c2 are constants determined by the initial or boundary conditions.

Final answer:

y = c1e^x + c2e^-x - x^2/3 + 2/3

Learn more about the differential equation :

https://brainly.com/question/2273154

#SPJ11

if a flexible copper cable has 133 strands, each 5.63 mils in diamteter, what is the size of the cable in circular mils

Answers

As a result, the cable is **3317.7 CM⁵ in diameter in round mils.

explain circular mills.

A circular mil (CM) is a measurement of area that is particularly useful for describing the size of a wire or cable's cross section. It is equivalent to the surface area of a circle with a one mil (a thousandth of an inch, or 0.0254 mm²) diameter. It is equivalent to roughly 0.7854 millionths of an inch square.

This formula can be used to get the cable's diameter in circular mils:

- Each strand has a diameter of 5.63 mils.

Each strand has an area of (5.63/2)2 × π, or 24.9 circular mils (CM).

- 133 strands have a total area of 133× 24.9, or 3317.7 CM.

As a result, the cable is **3317.7 CM**⁵ in diameter in round mils.

To know more about circular mils visit:

brainly.com/question/22321921

#SPJ1

A group of researchers found that the probability of completing a given optional assignment is 0.16. They then took a random sample of n-26 students. What is the expected number of students that will complete the assignment?

Answers

We can, probability of completing a given optional assignment is 0.16, expect about 4.16 students out of the 26 to complete the optional assignment.

What is the total expected number of students with complete the assignment?

The expected number of students that will complete the assignment can be found using the formula:

E(X) = np

where X is the random variable representing the number of students who complete the assignment, n is the sample size, and p is the probability of completing the assignment.

Substituting the given values, we get:

E(X) = 26 * 0.16

E(X) = 4.16

Therefore, we can expect about 4.16 students out of the 26 to complete the optional assignment. Since we can't have a fractional part of a student, we can round this up or down to the nearest whole number as needed.

Learn more about probability.

brainly.com/question/30034780

#SPJ11

(1 point) carry out the hexadecimal addition ca10 4f57 directly in hexadecimal. show your work. do not convert the numbers to decimal, add them in decimal and convert the sum back to hexadecimal.

Answers

The hexadecimal addition of CA10 and 4F57 directly in hexadecimal is B197.

How to carry out the hexadecimal addition?

Hi! I'd be happy to help you carry out the hexadecimal addition of CA10 and 4F57 directly in hexadecimal. Here are the steps:

1. Write down the two hexadecimal numbers one below the other, with the least significant digits (rightmost digits) aligned:
  CA10
+ 4F57

2. Perform column-wise addition starting from the rightmost column (least significant digit):
  0 + 7 = 7

3. Move to the next column and add the corresponding digits. If the sum exceeds 15 (F in hexadecimal), carry over the excess to the next column:
  1 + 5 = 6 (no carry over needed)

4. Continue the addition for the remaining columns, remembering to carry over when necessary:
  A + F = 19 (in hexadecimal, this is 13); carry over the 1
  1 + C + 4 = 11 (in hexadecimal, this is B)

5. Combine the results from each column to obtain the final sum: B197

So, the hexadecimal addition of CA10 and 4F57 directly in hexadecimal is B197.

Learn more about hexadecimal addition

brainly.com/question/28875438

#SPJ11

Find the area of each trapezoid. Round each answers to the nearest tenth.

Answers

Step-by-step explanation:

A trapezoid bases are the parallel sides

   the AVERAGE of the bases  X  the height    is the area

First one :   Height = 6cm    average of bases = (9.3+4.1) / 2 = 6.7 cm

    area =   6.7 cm * 6 cm = 40.2 c^2

The other three are similar...just different numbers...Using this method, you should be able to do them now .....

Answer:

A trapezoid bases are the parallel sides

  the AVERAGE of the bases  X  the height    is the area

First one :   Height = 6cm    average of bases = (9.3+4.1) / 2 = 6.7 cm

   area =   6.7 cm * 6 cm = 40.2 c^2

Read more on Brainly.com - https://brainly.com/question/31725626#readmore

Step-by-step explanation:

invent a paired data set, consisting of five pairs of observations, for which y¯1 and y¯2 are not equal, and sey¯1 > 0 and sey¯2 > 0, but sed¯ = 0.'

Answers

Pair 1: (2, 4), Pair 2: (4, 6), Pair 3: (6, 8), Pair 4: (8, 10), Pair 5: (10, 12)

How to create a paired data set?

To create a paired data set with the given conditions, we need to have five pairs of observations where the average of y1 and y2 are not equal, and the standard errors for y1 and y2 are greater than 0, but the standard error of the differences (sed) is 0.

Step 1: Invent five pairs of observations
Here's a paired data set that meets these requirements:

Pair 1: (2, 4)
Pair 2: (4, 6)
Pair 3: (6, 8)
Pair 4: (8, 10)
Pair 5: (10, 12)

Step 2: Verify that y¯1 and y¯2 are not equal
Calculate the average of y1 values and y2 values:

y¯1 = (2+4+6+8+10)/5 = 30/5 = 6
y¯2 = (4+6+8+10+12)/5 = 40/5 = 8

Since y¯1 ≠ y¯2 (6 ≠ 8), this condition is met.

Step 3: Verify that sey¯1 > 0 and sey¯2 > 0
As the data sets have different values, it's evident that the standard errors for y1 and y2 are greater than 0.

Step 4: Verify that sed = 0
Calculate the differences (d) for each pair:

d1 = 4 - 2 = 2
d2 = 6 - 4 = 2
d3 = 8 - 6 = 2
d4 = 10 - 8 = 2
d5 = 12 - 10 = 2

Since all differences are the same (2), the standard error of the differences (sed) is 0.
So, the paired data set provided meets all the given conditions.

Learn more about paired data set

brainly.com/question/17968124

#SPJ11

Policyholders of a certain insurance company have accidents at times distributed according to a Poisson process with rate λ. The amount of time from when the accident occurs until a claim is made has distribution G.
(a) Find the probability there are exactly n incurred but as yet unreported claims at time t.
(b) Suppose that each claim amount has distribution F, and that the claim amount is independent of the time that it takes to report the claim. Find the expected value of the sum of all incurred but as yet unreported claims at time t.

Answers

a. The expected value of the sum of all incurred but as yet

b. Unreported claims at time t is λt times the expected value of a single claim amount.

What is probability?

Probability is a branch of mathematics that deals with measuring the likelihood of an event occurring. It involves quantifying the chances of different outcomes of a random experiment, such as flipping a coin, rolling a die, or drawing a card from a deck.

According to the given information:

(a) Let N(t) be the number of claims incurred up to time t, and let S be the set of times when claims are incurred but not yet reported. Then, the probability that there are exactly n incurred but as yet unreported claims at time t is given by:

P(N(t) - |S| = n) = P(N(t) = n + |S|) × P(|S|)

Since the occurrence of claims follows a Poisson process with rate λ, the probability of n + |S| claims in time t is:

P(N(t) = n + |S|) = ( + |S| / (n + |S|)!)

The distribution of the time until a claim is reported, G, gives the probability that a claim is reported within some time interval after it is incurred. The probability that a claim is incurred but not reported by time t is given by:

P(|S|) = P(G > t)

Putting all these pieces together, we get:

P(N(t) - |S| = n) = ( + |S| / (n + |S|)!) ×) × P(G > t)

(b) Let X_i denote the claim amount for the i-th incurred but as yet unreported claim. Then, the total claim amount for all incurred but as yet unreported claims at time t is:

Y(t) = Σ_i= - |S| X_i

We can find the expected value of Y(t) by using the law of total expectation:

E(Y(t)) = E[E(Y(t) | N(t), S)]

Given N(t) and S, the expected value of Y(t) is just the sum of the expected values of the claim amounts for the unreported claims:

E(Y(t) | N(t), S) = Σ_i= E(X_i)

Since the claim amounts are independent and identically distributed according to F, we have:

E(X_i) = E(F)

Thus, we get:

E(Y(t)) = E[E(Y(t) | N(t), S)] = E[(n + |S|)E(F)] = λt × E(F)

Therefore, the expected value of the sum of all incurred but as yet unreported claims at time t is λt times the expected value of a single claim amount.

To know more about Probability visit:

https://brainly.com/question/30034780

#SPJ1

use lagrange multipliers to find the indicated extrema of f subject to two constraints, assuming that x, y, and z are nonnegative. maximize f(x, y, z) = xyzconstraints: x y z = 32, x − y + z = 12f( ___ ) = ____

Answers

The maximum value of f(x, y, z) = xyz subject to the given constraints is f(4, 4, 2) = 32.

To maximize f(x, y, z) = xyz subject to constraints x y z = 32 and x - y + z = 12 using Lagrange multipliers, we need to define a function L(x, y, z, λ, μ) that includes the constraints:

L(x, y, z, λ, μ) = xyz + λ(xyz - 32) + μ(x - y + z - 12)

Now, we need to find the partial derivatives with respect to x, y, z, λ, and μ, and set them to zero:

∂L/∂x = yz + λyz + μ = 0
∂L/∂y = xz + λxz - μ = 0
∂L/∂z = xy + λxy + λ = 0
∂L/∂λ = xyz - 32 = 0
∂L/∂μ = x - y + z - 12 = 0

Solving this system of equations, we get the following:

x = 4
y = 4
z = 2

Now, we can find the maximum value of f:

f(4, 4, 2) = 4*4*2 = 32

Thus, the maximum value of f(x, y, z) = xyz subject to the given constraints is f(4, 4, 2) = 32.

To learn more about Lagrange multipliers visit : https://brainly.com/question/4609414

#SPJ11

describe the given set with a single equation or with a pair of equations. the circle of radius centered at and lying in a. the xy-plane b. the yz-plane c. the plane y

Answers

The simplified versions of the given circle equation are a. x^2 + (y-1)^2 = 81, b.(y-1)^2 + z^2 = 81, and c. x^2 + z^2 = 81

a. The circle of radius 9 centered at (0, 1, 0) lying in the xy-plane can be described with the equation:
(x-0)^2 + (y-1)^2 = 9^2
Simplified, this becomes: x^2 + (y-1)^2 = 81

b. The circle of radius 9 centered at (0, 1, 0) lying in the yz- plane can be described with the equation:
(y-1)^2 + (z-0)^2 = 9^2
Simplified, this becomes: (y-1)^2 + z^2 = 81

c. If the circle of radius 9 centered at (0, 1, 0) is lying in the plane y, it means that the y-coordinate is constant throughout the circle. In this case, the equation becomes:
x^2 + z^2 = 9^2
Simplified, this becomes: x^2 + z^2 = 81, with y = 1

Learn more about Circle: https://brainly.com/question/24375372

#SPJ11

Question is in the picture.

Answers

Based on the options provided, the roots of the quadratic equation associated with the graph are -6 and 3, as they are the values where the graph intersects the x-axis. Thus, option A is correct.

What is the quadratic equation?

In a quadratic equation in the form of [tex]"ax^2 + bx + c = 0"[/tex]  , the roots (or solutions) can be determined from the x-intercepts of the associated graph of the quadratic equation.

which represent the points where the graph intersects the x-axis. These points are also known as the "zeros" or "roots" of the quadratic equation.

In the case of the values -6 and 3 that you mentioned, they are the x-intercepts or zeros of the graph. This means that when you plug in -6 and 3 into the equation or function that corresponds to the graph, the result is zero.

Based on the options provided, the roots of the quadratic equation associated with the graph are -6 and 3, as they are the values where the graph intersects the x-axis.

Therefore, option a.  [tex]-6[/tex] and  [tex]3 i[/tex]s the correct answer.

Learn more about quadratic here:

https://brainly.com/question/22364785

#SPJ1

I really need help im bad at Algebra

Answers

The line of best fit for the scatter plot is given as follows:

y = 2x.

How to define a linear function?

The slope-intercept representation of a linear function is given by the equation presented as follows:

y = mx + b

The coefficients of the function and their meaning are described as follows:

m is the slope of the function, representing the change in the output variable y when the input variable x is increased by one.b is the y-intercept of the function, which is the initial value of the function, i.e., the numeric value of the function when the input variable x assumes a value of 0. On a graph, it is the value of y when the graph of the function crosses the y-axis.

The graph touches the y-axis at the origin, hence the intercept b is given as follows:

b = 0.

Hence:

y = mx.

When x = 20, y = 40, hence the slope m is given as follows:

20m = 40

m = 40/20

m = 2.

Hence the equation is:

y = 2x.

More can be learned about linear functions at https://brainly.com/question/24808124

#SPJ1

set up the simplex matrix used to solve the linear programming problem. assume all variables are nonnegative. maximize f = 9x 3y subject to 2x 3y ≤ 300 x 4y ≤ 200.

Answers

The simplex matrix using the linear programming problem gives optimal solution x = 12.5, y = 0, with objective function value f = 9(12.5) + 3(0) = 112.5

To set up the simplex matrix for the given linear programming problem, we need to introduce slack variables for each inequality constraint and form the initial tableau as follows:

Basic Variables x y s1 s2 RHS

s1 2 3 1 0 300

s2 1 4 0 1 200

z -9 -3 0 0 0

In this tableau, x and y are the decision variables, s1 and s2 are the slack variables, and z is the objective function.

We start with the coefficients of the decision variables in the objective function, which are -9 and -3. We choose the variable with the most negative coefficient to enter the basis, which is y in this case.

To determine which variable to exit the basis, we calculate the ratio of the right-hand side (RHS) value to the coefficient of the entering variable for each constraint. The smallest nonnegative ratio corresponds to the variable that will exit the basis.

For the y variable, we have the following ratios:

s1: 300/3 = 100

s2: 200/4 = 50

Since the ratio for s2 is smaller, we choose s2 to exit the basis. To pivot, we divide the second row by 4 and perform row operations to eliminate the y variable from the other rows:

Basic Variables x y s1 s2 RHS

s1 2 0 1 -3/4 50

y 1/4 1 0 1/4 50

z -9/4 0 0 9/4 225

The new entering variable is x, with coefficient -9/4 in the objective function. The ratios for x are:

s1: 50/2 = 25

y: 50/(1/4) = 200

Therefore, y exits the basis and we pivot on the (2,1) element:

Basic Variables x y s1 s2 RHS

s1 1/2 0 1/2 -3/8 25

x 1/8 1 -1/8 1/8 12.5

z -9/8 0 9/8 9/8 237.5

The optimal solution is x = 12.5, y = 0, with objective function value f = 9(12.5) + 3(0) = 112.5

Know more about simplex matrix here:

https://brainly.com/question/29752219

#SPJ11

P1
A fruit punch that contains 70% truit juice is combined with 100% fruit juice. How many ounces of each should be used to make 54 oz of a mixture that is 90%
Part: 0/2

Answers

Answer:

Let x be the number of ounces of 70% fruit juice. Then 54 - x will be the number of ounces of 100% fruit juice.

.7x + 54 - x = .90(54)

54 - .30x = 48.6

.3x = 5.4, so x = 18

18 oz of 70% fruit juice, 36 ounces of 100% fruit juice.

We need 18 oz of the 70% fruit punch and 36 oz of the 100% fruit juice to make 54 oz of a mixture that is 90% fruit juice.

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Let's call the amount of the 70% fruit punch we'll use "x" and the amount of 100% fruit juice we'll use "y".

To start, we can create two equations based on the information we have.

The first equation represents the total amount of liquid in the final mixture:

x + y = 54

The second equation represents the percentage of fruit juice in the final mixture:

0.7x + y = 0.9(54)

Simplifying the second equation:

0.7x + y = 48.6

We can now use the first equation to solve for one of the variables in terms of the other.

Let's solve for "y".

y = 54 - x

Substituting this into the second equation:

0.7x + (54 - x) = 48.6

Simplifying as:

0.7x - x = 48.6 - 54

-0.3x = -5.4

x = 18

So we need 18 oz of the 70% fruit punch.

Using the first equation to solve for "y":

y = 54 - x

y = 54 - 18

y = 36

So we need 36 oz of the 100% fruit juice.

Therefore, we need 18 oz of the 70% fruit punch and 36 oz of the 100% fruit juice to make 54 oz of a mixture that is 90% fruit juice.

Learn more about the mathematical expression visit:

brainly.com/question/1859113

#SPJ2

Consider the random variable X having pdf fX (x) = .6 (x^2/β), for 0 < x ≤1. (a) Find the value of β that makes fX (x) a valid pdf. (b) Find the cdf for the random variable X. (c) Find the probability that the random variable X is greater than 2.

Answers

(a) The value of β that makes fX(x) a valid pdf is β = 0.2.

(b) The cdf for the random variable X is FX(x) = (3[tex]x^3[/tex]/10), for 0 < x ≤ 1.

(c) The probability that the random variable P(X > 2) = 0, since the range of possible values for X is from 0 to 1.

How to find the value of β?

To find the value of β that makes fX(x) a valid pdf, we need to ensure that the area under the pdf from 0 to 1 is equal to 1.

∫0¹ fX(x) dx = ∫0¹ 0.6(x²/β) dx = 0.6/β ∫0¹ x² dx = 0.6/β [[tex]x^3[/tex]/3]0¹ = 0.6/β * (1/3) = 1

Solving for β, we get:

0.6/β * (1/3) = 1

β = 0.6/3 = 0.2

Therefore, β = 0.2 makes fX(x) a valid pdf.

How to find the cdf for random variable?

To find the cdf for the random variable X, we integrate the pdf from 0 to x:

FX(x) = ∫[tex]0^x[/tex] fX(t) dt = ∫[tex]0^x[/tex] 0.6(t²/0.2) dt = 3[tex]t^3[/tex]/10|[tex]0^x[/tex] = (3[tex]x^3[/tex]/10) - 0

Therefore, the cdf for X is:

FX(x) = (3[tex]x^3[/tex]/10), for 0 < x ≤ 1

How to find the probability?

To find the probability that X is greater than 2, we need to use the fact that the probability of an event outside the sample space is 0. Since the range of possible values for X is from 0 to 1, the probability that X is greater than 2 is 0.

P(X > 2) = 0

Learn more about probability density function

brainly.com/question/31040390

#SPJ11

how long is a parking space ? select the best estimate

Answers

Answer:

So it would not be 6 cm because, that's like the size of a couple paper clips! it's not 6 millimeters either because that's very very small! 6 kilometers is ALOT! Do it would be 6 meters! A meter is about the length of a door frame! I hoped this helped! Good luck on that IXL!

let f (x) = cos(4x) 5. compute the following taylor polynomials of f. for any approximations, you should use around 6 decimals. p0(x) = p1(x) = p2(x) = p3(x) = p4(x) =

Answers

We have computed the Taylor polynomials of the given function f (x) = cos (4x), using around 6 decimals for approximation. These polynomials can then be used to approximate the given function.

What is function?

Function is a block of code that performs a specific task. It can accept input parameters and return a value or a set of values. Functions are used to break down a complex problem into simple, manageable tasks. They also help improve code readability and re-usability. By using functions, you can write code more efficiently and easily maintain your program.

The Taylor series of a given function is a polynomial approximation of that function, derived using derivatives. In this case, we are asked to compute the Taylor polynomial for the function f (x) = cos (4x).

The Taylor polynomials of f are as follows:

p0(x) = 1

p1(x) = 1 - 8x2

p2(x) = 1 - 8x2 + 32x4

p3(x) = 1 - 8x2 + 32x4 - 128x6

p4(x) = 1 - 8x2 + 32x4 - 128x6 + 512x8

For any approximations, we can use around 6 decimals. For instance, if x = 0.5, then p4(0.5) = 0.988377, which is an approximation of the actual value of f (0.5), which is 0.98879958.

In conclusion, we have computed the Taylor polynomials of the given function f (x) = cos (4x), using around 6 decimals for approximation. These polynomials can then be used to approximate the given function.

To know more about function click-
http://brainly.com/question/25841119
#SPJ1

An item is regularly priced at $30. It is now priced at a discount of 80% off the regular price. What is the price now?

Answers

Answer: $24

Step-by-step explanation: (30*80)/100

The price now is $6.

The following table gives the gold medal times for every other Summer Olympics for the women's 100 meter freestyle (swimming).
Year Time (seconds)
1912 82.2
1924 72.4
1932 66.8
1952 66.8
1960 61.2
1968 60.0
1976 55.65
1984 55.92
1992 54.64
2000 53.8
2008 53.1
d) Calculate the least squares line. Put the equation in the form of: ŷ = a + bx. (Round your answers to three decimal places.)
ŷ =____+____x
e) Find the correlation coefficient r. (Round your answer to four decimal places.)
r = ______
f) Find the estimated gold medal time for 1924. (Use your equation from part (d). Round your answer to two decimal places.)
_____ sec
Find the estimated gold medal time for 1992. (Use your equation from part (d). Round your answer to two decimal places.)
_____ sec
i) Use the least squares line to estimate the gold medal time for the 2012 Summer Olympics. (Use your equation from part (d). Round your answer to two decimal places.)
_____ sec

Answers

d) Least squares line ŷ = 521.2542 - 0.2349x.

e) Correlation coefficient r ≈ -0.9869

f) Estimated gold medal time ŷ for 1924 ≈ 71.26 sec

g) Estimated gold medal time ŷ for 1992 ≈ 53.14 sec

h) Estimate the gold medal time for the 2012 ŷ ≈ 52.12 sec

How to calculate each part of the question?

d) To find the least squares line, we need to calculate the mean and standard deviation of the year (x) and the time (y):

mean of x = (1912 + 1932 + 1952 + 1968 + 1976 + 1984 + 2000 + 2012)/8 = 1972

mean of y = (82.2 + 72.4 + 66.8 + 66.8 + 61.2 + 60.0 + 55.6 + 55.9 + 54.6 + 53.8 + 53.1)/11 = 63.2

standard deviation of x = √(((1912-1972)² + (1932-1972)² + ... + (2012-1972)²)/8) ≈ 44.54

standard deviation of y = √(((82.2-63.2)² + (72.4-63.2)² + ... + (53.1-63.2)²)/10) ≈ 10.53

Then, we can calculate the correlation coefficient r:

r = (1/10) * (((1912-1972)/44.54)(82.2-63.2)/10.53 + ((1932-1972)/44.54)(72.4-63.2)/10.53 + ... + ((2012-1972)/44.54)*(53.1-63.2)/10.53) ≈ -0.9869

Using the formula for the least squares regression line, we have:

b = r * (standard deviation of y / standard deviation of x) ≈ -0.2349

a = mean of y - b * mean of x ≈ 521.2542

Therefore, the least squares line is ŷ = 521.2542 - 0.2349x.

f) To estimate the gold medal time for 1924, we substitute x = 1924 into the equation for the least squares line:

ŷ = 521.2542 - 0.2349(1924) ≈ 71.26 sec

g) To estimate the gold medal time for 1992, we substitute x = 1992 into the equation for the least squares line:

ŷ = 521.2542 - 0.2349(1992) ≈ 53.14 sec

h) To estimate the gold medal time for 2012, we substitute x = 2012 into the equation for the least squares line:

ŷ = 521.2542 - 0.2349(2012) ≈ 52.12 sec

Learn more about Correlation coefficient.

brainly.com/question/15577278

#SPJ11

A village with 82people is hit by malaria. The government decides to give one net to each one of them. If 2 nets remained,how many packages of nets of six were taken to the villages?

Answers

14 packages of nets of six were taken to the village. If there are 82 people in the village, then 82 nets are needed to provide one net to each person.

However, we also know that there are 2 nets remaining, which means that a total of 82 + 2 = 84 nets were provided.

To determine how many packages of nets of six were taken to the village, we can divide the total number of nets by 6, and round up to the nearest whole number since we can't have a partial package of nets:

84 nets / 6 nets per package = 14 packages (rounded up)

Therefore, 14 packages of nets of six were taken to the village.

To know more about number of packages-

brainly.com/question/31298394

#SPJ4

Section 7.2: Problem 7 (1 point) Previous Problem Problem List Next Problem Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y= x², y = 0, x = 1, about the y-axis

Answers

The volume of the solid obtained by rotating the region bounded by the curves y = x², y = 0, x = 1 about the y-axis is π/2 cubic units.

How to find the volume of the solid obtained by rotating the region bounded by the curves?

To find the volume of the solid obtained by rotating the region bounded by the curves y = x², y = 0, x = 1 about the y-axis, we can use the method of cylindrical shells.

Consider a thin strip of width dx at a distance x from the y-axis. When this strip is rotated about the y-axis, it generates a cylindrical shell with radius x and height y = x².

The volume of the cylindrical shell is given by:

dV = 2πx(y)dx

= 2πx(x²)dx

= 2πx³dx

To find the total volume, we need to integrate the volume of all such cylindrical shells from x = 0 to x = 1:

V = ∫₀¹ 2πx³ dx

= 2π ∫₀¹ x³ dx

= 2π [x⁴/4]₀¹

= 2π(1/4)

= π/2

Therefore, the volume of the solid obtained by rotating the region bounded by the curves y = x², y = 0, x = 1 about the y-axis is π/2 cubic units.

Learn more about volume of solid

brainly.com/question/12649605

#SPJ11

suppose x is χ2 - distribution with degrees of 20. find a point a such that p(x < a) = 0.025

Answers

For X following a χ²-distribution with 20 degrees of freedom, the point 'a' such that P(X < a) = 0.025 is approximately 8.26.

To find the point 'a' such that P(X < a) = 0.025, where X follows a χ²-distribution with 20 degrees of freedom, you need to use the inverse chi-square distribution function (also called the chi-square quantile function).

Here's the step-by-step explanation:

1. Identify the given parameters: X follows a χ²-distribution with 20 degrees of freedom, and we need to find a point 'a' such that P(X < a) = 0.025.

2. Use the inverse chi-square distribution function (quantile function) with the given probability and degrees of freedom. This function will give you the value of 'a' corresponding to the specified probability.

In most statistical software or calculators, you can find this function. For example, in R programming, you can use the "qchisq()" function:

a = qchisq(0.025, df = 20)

3. Calculate the value of 'a'.

In this case, a ≈ 8.26.

Learn more about degrees of freedom: https://brainly.com/question/14267735

#SPJ11

Let f be the function given by f(x)=(x^2+x)cos(5x). What is the average value of f on the closed interval 2≤x≤6 ?a. -7.392b. -1.848c. 0.722

Answers

Average value of f on the closed interval 2≤x≤6 ≈ -1.848

How to find average value of f?

The average value of a function f(x) on a closed interval [a,b] is given by:

1/(b-a) × integral from a to b of f(x) dx

So, in this case, we need to find:

1/(6-2) × integral from 2 to 6 of f(x) dx

First, let's find the integral of f(x):

integral of (x²+x)cos(5x) dx

= (1/5) × integral of (x²+x) d(sin(5x))   (integration by parts)

= (1/5) × [(x²+x)sin(5x) - integral of (2x+1)sin(5x) dx]

= (1/5) × [(x²+x)sin(5x) + (2x+1)(cos(5x))/5] + C

So, the average value of f on [2,6] is:

1/(6-2) * integral from 2 to 6 of f(x) dx

= 1/4 × [(6²+6)sin(30) + (2×6+1)(cos(30))/5 - (2²+2)sin(10) - (2×2+1)(cos(10))/5]

≈ -1.848

Therefore, the answer is (b) -1.848 (rounded to three decimal places)

Learn more about closed interval .

brainly.com/question/30273384

#SPJ11

Which of the following is the definition for combination?
OA. A set of objects chosen from a smaller set in which the order of
the objects doesn't matter.
B. A set of objects chosen from a larger set in which the order of the
objects matters.
OC. A set of objects chosen from a larger set in which the order of the
objects doesn't matter.
OD. A set of objects chosen from a smaller set in which the order of
the objects matters.

Answers

Answer:

C. A set of objects chosen from a larger set in which the order of the objects doesn't matter.

Step-by-step explanation:

That is the definition of a combination. Order does not matter

For example, selecting 3 students from a total of 10 students. The set selected is a smaller set from a larger set

I NEED HELP ON THIS ASAP!!!!

Answers

In the two functions as the value of V(x) increases, the value of W(x) also increases.

What is the value of the functions?

The value of functions, V(x) and W(x) is determined as follows;

for h(-2, 1/4); the value of the functions is calculated as follows;

v(x) = 2ˣ ⁺ ³ = 2⁻²⁺³ = 2¹ = 2

w(x) = 2ˣ ⁻ ³ = 2⁻²⁻³ = 2⁻⁵ = 1/32

for h(-1, 1/2); the value of the functions is calculated as follows;

v(x) = 2ˣ ⁺ ³ = 2² = 4

w(x) = 2ˣ ⁻ ³ = 2⁻⁴ = 1/16

for h(0, 1); the value of the functions is calculated as follows;

v(x) = 2ˣ ⁺ ³ = 2³ = 8

w(x) = 2ˣ ⁻ ³ = 2⁻³ = 1/8

for h(1, 2); the value of the functions is calculated as follows;

v(x) = 2ˣ ⁺ ³ = 2⁴ = 16

w(x) = 2ˣ ⁻ ³ = 2⁻² = 1/4

for h(2, 4); the value of the functions is calculated as follows;

v(x) = 2ˣ ⁺ ³ = 2⁵ = 32

w(x) = 2ˣ ⁻ ³ = 2⁻¹ = 1/2

Learn more about functions here: brainly.com/question/10439235

#SPJ1

plsssssssssssssssssss help

Answers

Answer:

2210in^3

Step-by-step explanation:

since volume= length *width *height

and area= length * width

u alr know area

so if area=l*w

and area= 130

then 130=l*w

so subsittute 130 for length and width

volume=(130*17)

=2210in^3

Answer:

Step-by-step explanation:

Volume  = Area x Height

Area = 130 in^2

Height = 17 in

Volume = 130 x 17

Volume = 2210

Where do I get the solutions manual of "Linear Algebra and its Applications" by Gilbert Strang?

Answers

The solutions manual for "Linear Algebra and its Applications" by Gilbert Strang can typically be found on online bookstores, such as Amazon or Barnes & Noble.

Alternatively, you may also be able to find a digital copy of the solutions manual through online forums or academic websites. It is important to note that obtaining unauthorized copies of copyrighted materials is illegal, so be sure to obtain the solutions manual through legitimate sources.


You can find the solutions manual for "Linear Algebra and its Applications" by Gilbert Strang on various online platforms, such as Amazon or the publisher's website. You can also check your local bookstore or academic library for a copy of the solutions manual.

To know more about Linear click here

brainly.com/question/30444906

#SPJ11

Other Questions
a diprotic acid has a pka1 = 2.70 and pka2 = 6.50. what is the ph of a 0.10 m solution of this acid that has been one quarter neutralized? what is the ph when 3.9 g of sodium acetate, nac2h3o2 , is dissolved in 300.0 ml of water? (the ka of acetic acid, hc2h3o2 , is 1.8105 .) what is an effect of an increase in ocean temperature? Decide whether the Lewis structure proposed for each molecule is reasonable or not. BeH2. H---Be----H. Is this a reasonable structure? If not, why not? Yes, it's a reasonable structure, :F: No, the total number of valence electrons is wrong. No, the total number of valence electrons is wrong. In order to reopen a case, its current status must be: Find the following combinations nCr:(a) n = 11 and r = 1.(b) n = 11 and r = 7.(c) n = 11 and r = 11.(d) n = 11 and r = 4. You are biking to the library. When you are 75% of the way there, you realize you forgot a book. So you turn around and head back. When you are 1/3 of the way back, you realize you don't need the book, so you turn around again and bike 3.2 miles to the library. How far do you live from the library a student spends 14 hour on a project on wednesday and 18 hour on the same project on thursday. the student tells the teacher the project took 12 hour to complete.which statement is true?responses the student is correct because 78 is greater than 12.the student is correct because 7 8 is greater than 1 2 .the student is correct because 78 is less than 12.the student is correct because 7 8 is less than 1 2 .the student is incorrect because 38 is greater than 12.the student is incorrect because 3 8 is greater than 1 2 .the student is incorrect because 38 is less than 12. Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n=121, p=0.62 The mean, h, is (Round to the nearest tenth as needed.) Find the exact location of all the relative and absolute extrema of the function. (Order your answers from smallest to largest x.)g(x) = 9x2 36xg has a relative maximum at (x,y):g has an absolute minimum at (x,y): A boom operator needs to move an object from the ground onto a stand without moving the vehicle. What should she do with the hydraulic cylinders? a. Extend A, extend B b. Retract A, extend B c. Retract A, retract B b. Extend A, retract B A Bloomberg BusinessWeek subscriber study asked, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" A second question asked if the type of airline ticket purchased most often was for domestic or international travel. Sample data obtained are shown in the following table.a. Using a .05 level of significance, is the type of ticket purchased independent of the type of flight?What is your conclusion?b. Discuss any dependence that exists between the type of ticket and type of flight. 19. Dust that is heated to 30 K will emit a blackbody spectrum that peaks ata. 1 m.b. 30 m.c. 50 m.d. 100 m.e. 500 m.20. Sitting in a 100F hot tub feels much hotter than standing outside on a 100F day. This analogy illustrates whya. interstellar dust is dark at optical wavelengths but bright in the infrared.b. supernovae can heat their shells to such high temperatures.c. an astronaut would feel cold standing in the 106 K intercloud gas.d. the Solar System is immersed in a hot bubble of gas.e. fusion occurs only in the cores of stars. describe in detail the steps in inserting a key with value 184 in the original tree. show the node which undergoes the change, and how does it look after the change. [5 points] what special property of the exclusive or gate that allows us to build an adder-subtractor circuit using full adders and exclusive or gates? Why does Hume say that it is really important to challenge impressions and ideas with pragmatic thinking, critical thinking, logic, and reason in an experimentally scientific fashion? Use a real life example of why this might be an important way to challenge ideas and impressions. (Think social media.) What is the meaning of string in Clay LLC placed in service machinery and equipment (seven-year property) with a basis of $3,450,000 on June 6, 2019. Assume that Clay has sufficient income to avoid any limitations. Calculate the maximum depreciation expense including 179 expensing (ignoring any possible bonus depreciation). (Use MACRS Table 1.) (Round final answer to the nearest whole number.)Group of answer choices$1,020,000$493,005$455,857$595,857None of the choices are correct. How can the Ames test distinguish mutagens that cause small insertions /deletions from those that cause base substitutions? What is the result of the military action from scene two act five scene three Julius caesar