The equation of the tangent is simply x = sin(9t) cos(t).
How to find the equation of the tangent?To find the equation of the tangent to the curve at the point corresponding to the given value of the parameter, we first need to find the derivative of y with respect to x.
dy/dx = (dy/dt)/(dx/dt)
= (-9sin(9t)sin(t) - cos(t)cos(9t)) / (9cos(9t)cos(t) - sin(9t)sin(t))
= -9tan(t) - cot(9t)
Now, we can find the slope of the tangent at the given point by substituting the value of t:
slope = -9tan(t) - cot(9t)
slope at t =
= -9tan() - cot()
= -9(0) - cot(0)
= -∞
This means that the tangent is vertical at the point corresponding to the given value of the parameter.
Therefore, the equation of the tangent is simply x = sin(9t) cos(t).
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please help i rlly need it! i’ll mark brainliest:)
Answer:
2x - 6 + 7x + 4 = 90
Step-by-step explanation:
We Know
It is a right angle, meaning 90°
2x - 6 + 7x + 4 must be equal to 90°
So, the answer is 2x - 6 + 7x + 4 = 90
problem 4.3.4 for a constant parameter a > 0, a rayleigh random variable x has pdf fx (x) = { a2xe−a2x2/2x > 0, 0 otherwise. What is the CDF of X?
The CDF of X for a constant parameter a > 0, a rayleigh random variable x is [tex]F_{X}(x) = 1 - e^{(-a^2x^2/2)[/tex] for x > 0, and 0 otherwise.
To find the CDF (Cumulative Distribution Function) of a Rayleigh random variable X with the given [tex]PDF f_X(x) = {a^2xe^{(-a^2x^2/2)[/tex] for x > 0, 0 otherwise}, we need to integrate the PDF from 0 to x. Here's the solution:
[tex]CDF F_X(x)[/tex] = ∫[tex][a^2xe^{(-a^2x^2/2)]}dx[/tex] from 0 to x
Let's denote u = [tex]a^2x^2/2[/tex]. Then, du = [tex]a^2xdx[/tex]. So the integral becomes:
[tex]F_X(x)[/tex] = ∫[tex][e^{(-u)}du][/tex] from 0 to [tex]a^2x^2/2[/tex]
Now, integrate [tex]e^{(-u)}[/tex] with respect to u:
[tex]F_X(x)[/tex] = [tex]-e^{(-u)[/tex] | from 0 to [tex]a^2x^2/2[/tex]
Evaluate the definite integral:
[tex]F_X(x)[/tex] = [tex]-e^{(-a^2x^2/2)} + e^{(0)} = 1 - e^{(-a^2x^2/2)[/tex]
Thus, the CDF of X is [tex]F_X(x)[/tex] = [tex]1 - e^{(-a^2x^2/2)[/tex] for x > 0, and 0 otherwise.
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what is the solution to Arccos 0.5?
Answer:
60
Step-by-step explanation:
The arc cosine of 0.5 can be written as cos⁻¹(0.5). To find its value in degrees, we can use a calculator or reference table. Specifically, we have:
cos⁻¹(0.5) ≈ 60 degrees
If a sample contains 12.5% parent, how many half lives ave passed? If the radioactive pair is K-40 and Ar-40, what is the actual age of the sample?
If a sample contains 12.5% parent, 3 half lives are passed and if the radioactive pair is K-40 and Ar-40, the actual age of the sample is 3.75 billion years.
If a sample contains 12.5% parent, it means that 3 half-lives have passed. To calculate the actual age of the sample with the radioactive pair K-40 and Ar-40, you need to know the half-life of K-40, which is 1.25 billion years. The actual age of the sample can be found by multiplying the half-life by the number of half-lives passed: 1.25 billion years * 3 = 3.75 billion years. Therefore, the actual age of the sample is 3.75 billion years.
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Can someone help me with this,it’s very hard to do
Answer:3.99
Step-by-step explanation:
i just kniow
evaluate x d/dx ∫ f(t) dta
Using Leibniz's rule, the final answer is xd/dx ∫ f(t) dt = x f(x) + ∫ f(t) dt + x f'(x)
Using Leibniz's rule, we have:
x d/dx ∫ f(t) dt = x f(x) + ∫ x d/dx f(t) dt
The first term x f(x) comes from differentiating the upper limit of integration with respect to x, while the second term involves differentiating under the integral sign.
If we assume that f(x) is a differentiable function, then by the chain rule, we have:
d/dx f(x) = d/dx [f(t)] evaluated at t = x
Therefore, we can rewrite the second term as:
∫ x d/dx f(t) dt = ∫ x d/dt f(t) dt evaluated at t = x
= ∫ f(t) dt + x f'(x)
Substituting this into the original equation, we obtain:
xd/dx ∫ f(t) dt = x f(x) + ∫ f(t) dt + x f'(x)
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Find the amount of money required for fencing (outfield, foul area, and back stop), dirt (batters box, pitcher’s mound, infield, and warning track), and grass sod (infield, outfield, foul areas, and backstop). Need answers for each area.
The amount of fencing, dirt and sod for the baseball field are: length of Fencing & 1410.5 ft. Area of the sod ≈ 118017.13ft² Area of the field covered with dist ≈ 7049.6ft²
How did we get the values?Area of a circle = πr²
Circumference of a circle = 2πr
where r is the radius of the circle
The area of a Quarter of a circle is therefore;
Area of a circle/ 4
The perimeter of a Quarter of a Circle is;
The perimeter of a circle/4
Fencing = ¼ x 2 x π x 380 + 2 x 15 +2 x 380 + ¼ x 2 x π x 15
Fencing = 197.5π + 190π = 1410.5 feet.
Grass =
π/4 x (380 - 6)² + 87 ² - π/4 × (87 + 30)² + 2 x 380 x 15 + π/4 x 15² - (3/4) x π x 10² - 25π
= 31528π + 18969 = 118017.13
The area Covered by the sod is about 118017.13Sq ft.
Dirt = π/4 x 380 ² - π/4 x (380 - 6)² + π/4 (87 + 30)² - 87² + π100 = (18613π - 30276)/4
= 7049.6
The area occupied by the dirt is about 7049.6 Sq feet
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Refer to the table of sandwich demand. suppose x = 1. then the slope of the market demand curve is __________ when price is on the vertical axis. a. -3.b. -1/3. c. 1/3.
Based on the information given, we can assume that "x" represents the price of sandwiches, and "demand" refers to the quantity of sandwiches that consumers are willing and able to buy at that particular price. The term "market" refers to the overall demand for sandwiches in the entire market, rather than just one individual consumer.
If x = 1, we can look at the table to see that the quantity demanded is 6 sandwiches. We can use this information to calculate the slope of the market demand curve, which represents the relationship between the price of sandwiches and the quantity demanded by all consumers in the market.
To calculate the slope, we need to find two points on the demand curve. Let's use the points (1,6) and (2,4), since they are the closest to x=1. We can use the slope formula:
slope = (y2 - y1) / (x2 - x1)
slope = (4 - 6) / (2 - 1)
slope = -2
So the slope of the market demand curve when the price is on the vertical axis is -2. However, none of the answer choices given match this result.
The closest answer is (b) -1/3, but this is not correct based on the calculations we just did.
Therefore, the correct answer cannot be determined with the information given.
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there are 6 large bags and 4 small bags of stones.Each bags hold the same number of stones as the other bags of the same size .how could you represent the total number of the stones with a polynomial
Answer:
Let's represent the number of stones each bag holds by the variable x.
Then the total number of stones in the 6 large bags is 6x, and the total number of stones in the 4 small bags is 4x.
Therefore, the total number of stones can be represented by the polynomial:
6x + 4x = 10x
So the polynomial is 10x, which represents the total number of stones.
Answer:
Step-by-step explanation:
large bags = x
small bags = y
6x + 4y
35) If you think the relationship between the LHS variable and a RHS variable is non-linear, what can/should you do?
If you think the relationship between the LHS (Left Hand Side) variable and a RHS (Right Hand Side) variable is non-linear, you can/should:
1. Transform the variables: Apply transformations, such as logarithmic, exponential, or power transformations, to make the relationship more linear.
2. Use non-linear regression models: Consider using non-linear regression models, like polynomial, exponential, or logistic regression, to better capture the non-linear relationship.
3. Include interaction terms: Add interaction terms between RHS variables to your model to capture the combined effect of two or more variables on the LHS variable.
By following these steps, you can better account for the non-linear relationship between the LHS variable and the RHS variable in your analysis.
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the binomial theorem states that for any real numbers a and b (a b)n=∑nk=0(nk)an−kbk, for any integer n ≥0 use this theorem to show that for any integer n ≥0m ∑nk=0(−1)k(nk)3n−k2k=1
Answer:
Step-by-step explanation:
We can use the Binomial Theorem to show this by letting a=3 and b=2 in the formula:
(a+b)^n = ∑(n choose k) a^(n-k) b^k
Substituting the values of a and b, we get:
(3+2)^n = ∑(n choose k) 3^(n-k) 2^k
5^n = ∑(n choose k) 3^(n-k) 2^k
Multiplying both sides by (-1)^n, we get:
(-1)^n 5^n = ∑(n choose k) (-1)^n 3^(n-k) 2^k
(-1)^n 5^n = ∑(n choose k) (-1)^k 3^(n-k) 2^k
Using the property that (n choose k) = (n choose n-k), we can simplify the expression:
(-1)^n 5^n = ∑(n choose n-k) (-1)^(n-k) 3^(k) 2^(n-k)
(-1)^n 5^n = ∑(n choose k) (-1)^(n-k) 3^(k) 2^(n-k)
We recognize the sum on the right-hand side as the expansion of (3-2)^n:
(-1)^n 5^n = (3-2)^n = ∑(n choose k) (-1)^(n-k) 3^(k) 2^(n-k)
Rearranging, we get:
∑(n choose k) (-1)^k 3^(n-k) 2^k = 5^n
Dividing both sides by 5^n, we get:
∑(n choose k) (-1)^k (3/5)^(n-k) (2/5)^k = 1
We recognize the left-hand side as a binomial expansion with coefficients (n choose k) and terms (3/5)^(n-k) and (2/5)^k. Therefore, the sum of these terms must equal 1, by the Binomial Theorem. This verifies the result.
when the alternative hypothesis says that the average of the box is greater than the given value:
One tail test requires stronger evidence to reject the null hypothesis Better to use two-tail test
Better to use one-tail test One-tail or two-tail test will give the same results
The test, and it is not necessarily stronger for one-tailed tests compared to two-tailed tests
When the alternative hypothesis says that the average of the box is greater than the given value, this is known as a one-tailed test.
In a one-tailed test, we are only interested in whether the data falls in one direction, either above or below a certain value. In contrast, a two-tailed test is when we are interested in whether the data falls in either direction, above or below a certain value.
In terms of which test to use, it depends on the context and the research question. If the research question specifically asks whether the data falls above a certain value, then a one-tailed test may be more appropriate. However, if there is a possibility that the data could fall in either direction and we want to be able to detect a significant difference in either direction, then a two-tailed test may be more appropriate.
Regarding the strength of evidence required to reject the null hypothesis, it is not necessarily true that one-tailed tests require stronger evidence than two-tailed tests. The level of significance, or alpha, that we choose for the test is what determines the strength of evidence required to reject the null hypothesis.
For example, if we choose a significance level of 0.05, then we require evidence that there is less than a 5% chance that our results occurred by chance alone in order to reject the null hypothesis. This level of evidence is the same for both one-tailed and two-tailed tests, and it is up to the researcher to determine what level of significance is appropriate for their research question.
In conclusion, whether to use a one-tailed or two-tailed test depends on the research question and whether we are interested in detecting a significant difference in one direction or both directions. The strength of evidence required to reject the null hypothesis is determined by the level of significance chosen for the test, and it is not necessarily stronger for one-tailed tests compared to two-tailed tests.
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 Complete the square to re-write the quadratic function in vertex form
The vertex form of the quadratic function y = x² - 6x - 7 is y = (x - 3)² - 16
What is the vertex form of the quadratic function?Given the quadratic function in the question:
y = x² - 6x - 7
The vertex form of a quadratic function is expressed as:
y = a(x - h)² + k
Where (h, k) is the vertex of the parabola and "a" is a coefficient that determines the shape of the parabola.
To write y = x² - 6x - 7 in vertex form, we need to complete the square.
We can do this by adding and subtracting the square of half the coefficient of x:
y = x² - 6x - 7
y = (x² - 6x + 9) - 9 - 7 (adding and subtracting 9)
y = (x - 3)² - 16
Hence, the vertex form is:
y = (x - 3)² - 16
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What is the slope of the line that passes through the points
(2, 3) and (4, 5)? A) 1 B) 2 C) 3 D) 4
Answer:
A) Slope=1
Step-by-step explanation:
To find the slope of the line passing through the points (2, 3) and (4, 5), we can use the slope formula:
slope = (y2 - y1) / (x2 - x1)
where (x1, y1) = (2, 3) and (x2, y2) = (4, 5).
Plugging in the values, we get:
slope = (5 - 3) / (4 - 2)
= 2 / 2
= 1
Therefore, the slope of the line is 1. Answer: A) 1.
Answer
m = 1
In-depth Explanation
To calculate slope, we use the formula
[tex]\sf{m=\dfrac{y_2-y_1}{x_2-x_1}}[/tex]Where m is the slope and (y2, y1)( x2, x1) are points on the line.
Calculating :
[tex]\sf{m=\dfrac{5-3}{4-2}}[/tex][tex]\sf{m=\dfrac{2}{2}}[/tex][tex]\sf{m=1}[/tex]Therefore, the slope is m = 1
in exercises 5–6,find the domain and codomain of the transformation defined by thematrix product.(a) [ 6 3 -1 7] [x1 x2] (b) [2 1 -6 3 7 -4 1 0 3} {x1 x2 x3]
Let's find the domain and codomain for each of the given matrices.
(a) The given matrix product is: [ 6 3 ] [x1] [-1 7 ] [x2]
The domain of a transformation is the set of all possible input vectors. In this case, the input vector is [x1, x2]. Since there are no restrictions on the values of x1 and x2, the domain is all real numbers for both components.
Mathematically, the domain is R^2, where R represents the set of all real numbers. The codomain of a transformation is the set of all possible output vectors. The given transformation is a 2x2 matrix, which means it maps R^2 to R^2.
Thus, the codomain is also R^2.
(b) The given matrix product is: [ 2 1 -6 ] [x1] [ 3 7 -4 ] [x2] [ 1 0 3 ] [x3]
The domain of this transformation is the set of all possible input vectors. In this case, the input vector is [x1, x2, x3]. Since there are no restrictions on the values of x1, x2, and x3, the domain is all real numbers for each component.
Mathematically, the domain is R^3. The codomain of this transformation is the set of all possible output vectors. The given transformation is a 3x3 matrix, which means it maps R^3 to R^3.
Thus, the codomain is also R^3.
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Can you please help me find out what
A’: (_ , _)
B’: (_ , _)
C’: (_ , _)
D’: (_ , _)
is
i’ll give you 50 points if you help me find the answer for it.
The age of 5 singers are 55,52,50,x, and 40 years.if their mean age is 47. find the value of x.
The value of x from the mean age is 38
The mean age is 47
The age of the five singers are 55,52,50,x and 40
The value of x can be calculated as follows
55 + 52 + 50 + x + 40/5= 47
cross multiply both sides
55 + 52 + 50 + x + 40=235
collect the like terms
157 + 40 + x= 235
197 + x= 235
x= 235-197
x= 38
The value of x is 38
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If the point (a,b) is a local minimum, then what will be true about f'(a)? a. It's positive b. Cannot be determined c. It's negative d. It's zero
The derivate f'(a) when the point (a, b) is a local minimum. In this case, the correct answer is: d. It's zero
When a point (a, b) is a local minimum, the derivative f'(a) will be zero. This is because, at a local minimum, the function changes its direction from decreasing to increasing, and the slope of the tangent line is zero.
If the point (a,b) is a local minimum of a differentiable function f, then f'(a) = 0.
This is because at a local minimum, the slope of the tangent line to the graph of f at point (a,b) is zero (since the derivative f'(x) gives the slope of the tangent line at point x). If the slope of the tangent line at point (a,b) is zero, then the derivative f'(a) must also be zero.
Therefore, the correct answer is (d) it's zero
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find p( 2.5 < x < 6.5).
Without knowledge of the distribution of x, we cannot make any further calculations.
Without additional information about the distribution of variable x, we cannot determine p(2.5 < x < 6.5).
If we know the distribution, we could use the probability density function (PDF) or cumulative distribution function (CDF) to calculate the probability. For example, if x is a normally distributed variable with mean 5 and standard deviation 1, we could use the standard normal distribution to find:
p(2.5 < x < 6.5) = p((2.5-5)/1 < (x-5)/1 < (6.5-5)/1)
= p(-2.5 < z < 1.5)
= Φ(1.5) - Φ(-2.5)
≈ 0.7745 - 0.0062
≈ 0.7683
But without knowledge of the distribution of x, we cannot make any further calculations.
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find a general solution to the differential equation. 6y'' 6y=2tan(6)-1/2e^{3t}
The general solution to the differential equation 6y'' + 6y = 2tan(6) - 1/2e^{3t} is y(t) = c1*cos(t) + c2*sin(t) + (1/6)tan(6) - (1/36)e^{3t}.
To find this solution, first, solve the homogeneous equation 6y'' + 6y = 0. The characteristic equation is 6r^2 + 6 = 0. Solving for r gives r = ±i.
The homogeneous solution is y_h(t) = c1*cos(t) + c2*sin(t), where c1 and c2 are constants. Next, find a particular solution y_p(t) for the non-homogeneous equation by using an ansatz. For the tan(6) term, use A*tan(6), and for the e^{3t} term, use B*e^{3t}.
After substituting the ansatz into the original equation and simplifying, we find that A = 1/6 and B = -1/36. Thus, y_p(t) = (1/6)tan(6) - (1/36)e^{3t}. Finally, combine the homogeneous and particular solutions to get the general solution: y(t) = c1*cos(t) + c2*sin(t) + (1/6)tan(6) - (1/36)e^{3t}.
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In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student has a dog given that they do not have a cat?
Has a cat Does not have a cat
Has a dog 11 10
Does not have a dog 5 2
The probability that a student has a dog, given that they do not have a cat is 5/6.
How to find the probability ?The probability that a student has a dog given that they do not have a cat is :
P ( Has a dog | Does not have a cat ) = P ( Has a dog and does not have a cat) / P ( Does not have a cat )
Total number of students = 11 + 10 + 5 + 2 = 28
P ( Has a dog | Does not have a cat ):
= (10 / 28) / (12 / 28)
= 10 / 12
= 5 / 6
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Determine whether the sequence converges or diverges. If it converges, find the limit. (If an answer does not exist, enter DNE.)an = ln(7n^2 + 3) − ln(n^2 + 3)lim n→[infinity] an = ???
The limit of the sequence is ln(7) and the sequence converges to ln(7).
To determine the convergence of the sequence, we need to investigate the behavior of its terms as n approaches infinity.
We have:
[tex]an = ln(7n^2 + 3) − ln(n^2 + 3)[/tex]
To simplify this expression, we can use the property of logarithms that states [tex]ln(a) - ln(b) = ln(a/b)[/tex]:
[tex]an = ln[(7n^2 + 3)/(n^2 + 3)][/tex]
Now, let's investigate the behavior of the fraction inside the natural logarithm as n approaches infinity. We can use the fact that the leading term in the numerator and denominator dominates as n gets large:
[tex](7n^2 + 3)/(n^2 + 3) ≈ 7[/tex]
Therefore, as n approaches infinity, an approaches ln(7), which is a finite number. Thus, the sequence converges to ln(7).
Therefore, the limit of the sequence as n approaches infinity is:
[tex]lim n→∞ an = ln(7)[/tex]
Therefore, the limit of the sequence is ln(7) and the sequence converges to ln(7).
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solve using the quadratic formula: 2x^2+3m=77
Answer:
The whole answer I've written after x needs to be in a square root sign.
x=77-3m/2
The / means a fraction sign
if you're confused lmk I'll explain
Hope it helps! x
nd the standard form of the equation of the hyperbola with the given characteristics. vertices: (1, −3), (5, −3); passes through the point (−3, 5)
This is the equation of a hyperbola with center (3, -3), vertices (1, -3) and (5, -3), and passing through the point (-3, 5).
To find the standard form of the equation of the hyperbola, we need to first determine the center of the hyperbola. The center is the midpoint of the line segment connecting the vertices, which is:
((1+5)/2, (-3-3)/2) = (3, -3)
So the center is (3, -3). Next, we need to determine the distance between the center and each vertex, which is called the distance between the center and the foci. The distance between the center and each vertex is 4, so the distance between the foci is:
c = √(a² + b²), where a = 4 and b is the distance between the center and either vertex
b = 3, so c = √(4² + 3²) = 5
Now we have all the information we need to write the standard form of the equation of the hyperbola:
[(x - 3)² / 4²] - [(y + 3)² / 5²] = 1
This is the equation of a hyperbola with center (3, -3), vertices (1, -3) and (5, -3), and passing through the point (-3, 5).
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The graph shows the height of a tire's air valve y, in inches, above or below the center of the tire, for a given number of seconds, x.
What is the diameter of the tire?
The diameter of the tire based on the amplitude of the sinusoidal graph of the height of the tire valve, y inches above or below the center of the tire is 20 inches.
What is a sinusoidal function?A sinusoidal function is a periodic function that is based on the sine or cosine function.
The shape of the graph is the shape of a sinusoidal function graph.
The y-coordinates of the peak and the through are; y = 10 and y = -10
The shape of the tire is a circle
The amplitude, A, of the sinusoidal function, which has a magnitude equivalent to the length of the radius of the tire is therefore;
A = (10 - (-10))/2 = 10
The radius of the tire, r = A = 10 inches
The diameter of the tire = 2 × The radius of the tire
The diameter of the tire = 2 × 10 inches = 20 inches
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suppose that the regression you suggested for the preceding question yielded a sse of 24.074572. calculate the f-statistic you’d use to test the hypothesis.
The f-statistic use to test the hypothesis.is 34.719264.
How to calculate the F-statistic for testing?To calculate the F-statistic for testing the overall significance of the linear regression model,
we need to compare the regression sum of squares (SSR) to the residual sum of squares (SSE) and the degrees of freedom associated with each.
The formula for the F-statistic is:
F = (SSR / k) / (SSE / (n - k - 1))
where k is the number of predictor variables in the model, and n is the sample size.
Since the question does not provide the values of k and n, I will assume that k = 1 (simple linear regression) and use the information given in the previous question to find n.
From the previous question, we have:
SSE = 24.074572
MSE = SSE / (n - 2) = 2.674952
SSTO = SSR + SSE = 83.820408
R-squared = SSR / SSTO = 0.7136
We can use R-squared to find SSTO:
SSTO = SSR / R-squared = 83.820408 / 0.7136 = 117.539337
Then, we can use SSTO and MSE to find n:
SSTO / MSE = n - 2
117.539337 / 2.674952 = n - 2
n = 45
Now we can substitute the values of k, n, SSR, and SSE into the formula for the F-statistic:
F = (SSR / k) / (SSE / (n - k - 1))
F = ((117.539337 - 83.820408) / 1) / (24.074572 / (45 - 1 - 1))
F = 34.719264
Therefore, the F-statistic is 34.719264.
This value can be used to test the hypothesis that the slope coefficient is equal to zero, with a significance level determined by the degrees of freedom and the chosen alpha level.
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if y'=x(1 + y) and y>-1 hen y=a. y = sin xb. y = 3 x^2 + Cc. y = Ce x2/2 – 1d. y = ½ e^x2 + Ce. y = C √ x + 3
The solution to the given differential equation y' = x(1 + y), with the constraint y > -1, can be expressed in terms of different functions and constants. The possible solutions are: y = sin(x) + a, y = 3x² + Cc, y = Ce^(x²/2) - 1, y = 1/2e^(x²) + Ce, and y = C√x + 3, where a, Cc, and Ce are constants.
Given the differential equation: y' = x(1 + y), where y > -1, we can solve it as follows:
y = sin(x) + a:
We can rewrite the given equation as y' = x + xy. Separating variables, we get: (1 + y)dy = xdx. Integrating both sides, we obtain: ∫(1 + y)dy = ∫xdx. This yields: y + y²/2 = x²/2 + C1, where C1 is a constant of integration. Solving for y, we get: y = x²/2 + C1 - y²/2. Substituting y = sin(x) + a, we get: sin(x) + a = x²/2 + C1 - (sin(x) + a)²/2. Rearranging and simplifying, we get: sin(x) + a = x²/2 + C1 - (sin²(x) + 2asinx + a²)/2. Finally, solving for y, we obtain: y = sin(x) + a.
y = 3x² + Cc:
We can directly integrate the given equation with respect to x, which yields: y = 3x² + Cc, where Cc is a constant of integration.
y = Ce^(x²/2) - 1:
We can rewrite the given equation as y'/(1 + y) = x. Separating variables, we get: dy/(1 + y) = xdx. Integrating both sides, we obtain: ∫dy/(1 + y) = ∫xdx. This yields: ln|1 + y| = x²/2 + C2, where C2 is a constant of integration. Exponentiating both sides, we get: 1 + y = e^(x²/2 + C2). Rearranging, we obtain: y = Ce^(x²/2) - 1, where C is a constant.
y = 1/2e^(x²) + Ce:
We can directly integrate the given equation with respect to x, which yields: y = 1/2e^(x²) + Ce, where Ce is a constant of integration.
y = C√x + 3:
We can directly integrate the given equation with respect to x, which yields: y = C√x + 3, where C is a constant.
Therefore, the solutions to the given differential equation y' = x(1 + y), with the constraint y > -1, are: y = sin(x) + a, y = 3x² + Cc, y = Ce^(x²/2) - 1, y = 1/2e^(x²) + Ce, and y = C√x + 3, where a, Cc, and Ce are constants.
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The scatter plot shows the time spent watching TV, x, and the time spent doing homework, y, by each of 24 students last week.
(a) Write an approximate equation of the line of best fit for the data. It doesn't have to be the exact line of best fit.
(b) Using your equation from part (a), predict the time spent doing homework for a student who spends 8hours watching TV.
a) y = -0.75x + 25 approximate equation of the line of best fit for the data.
b) The prediction for time spent doing homework for someone who spends 12 hours watching TV is 16 hours.
a) I added the graph to Desmos, online graphic calculator and superimposed a line which I think is a good/decent fit to the given data. Image for reference:
Thus, we get the line of best fit (approximately) equation as
y = -0.75x + 25 (in equation)
b) From the given equation, the prediction for time spent doing homework for someone who spends 12 hours watching TV is
y = -0.75x + 25.
y = -0.75(12) + 25
y = -9 + 25
y = 16
Thus, the prediction for time spent doing homework for someone who spends 12 hours watching TV is 16 hours.
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How many decaliters are in 44. 6 milliliters?
Answer:
0.00446
Step-by-step explanation:
1 decailiters = 10,000 milliliters.
44.6 / 10,000= 0.00446
13. Caleb and his friends went to see a movie at 7:35 p.m. They left at 10:05
How long was the movie?
awas
Answer:
2 hours 30 mins
Step-by-step explanation:
We Know
Caleb and his friends went to see a movie at 7:35 p.m.
They left at 10:05
How long was the movie?
We Take
10:05 - 7:35 = 2 hours 30 mins
So, the movie is 2 hours 30 mins long.