Answer:
h(t) = -16t^2+125t
We need to find h(t) when t = 4 s:
h(4) = -16*4^2+125*4
h(4) = 244 ft
The height of the object after 4 seconds is 244 feet.
(Urgent) Worth 10 points 7.3
Answer:
m∡CBD = 135°
Step-by-step explanation:
m + 3m = 180
4m = 180
m = 180/4
m = 45
angle CBD is 3(45) = 135 degrees
A coin is tossed 100 times. WHich portion would you use to find how many times you'd expect the coin to land on heads?
Answer:
i would use 1/2 because theres 2 sides on a coin and if you flip it 100 times then the probability of it landing on heads is about 50 out of 100
Step-by-step explanation:
A helicopter hovers 1500 feet above a small island. The
figure shows that the angle of depression from the
helicopter to point P is 40°.
How far off the coast, to the nearest foot, is the island?
400
1500ft
Please help me solve this problem
Answer:
the island is 1787.63ft far.
Step-by-step explanation:
<P=40° alternate angle
in triangle
relationship between perpendicular and base is given by tan angle
tan 40=p/b
tan40=1500/b
b=1500/tan40=1787.63ft
The ratio of tables to chairs at the furniture store is 1:6. There are 30 chairs. How many tables are there?
Answer:
5 : 30
Step-by-step explanation:
30/6 = 5
1 * 5 = 5
5 : 30
Hope it helps
Please mark me as the brainliest
Thank you
Which is the sum of and 3/10 and 1/3
Step-by-step explanation:
sum=addition
3/10 +1/3
find the LCM of 10 and 3 Which is 30
9+10/30=19/30
I hope it helps ☺️
Which expression is equivalent to 4(5r+9)?
Find the lateral surface area of the figure below. Round the the nearest tenths place.
help please !
10 Mrs. Randall bought tickets to the art museum for all the fifth-grade students. Each ticket cost $12, and the total cost of the tickets was $1,152. How many fifth-grade students are there?
Answer:
Step-by-step explanation:
12s=1152 (divide each side by 12 to isolate s)
s=96
So there were 96 students.
Gavin has a board that is ten feet long. Gavin is using the board to saw off pieces of wood needed for a building project. First Gavin saws off 2/10 of the board. Next Gavin saws off 5/10 of the board. Last Gavin saws off 1/10 of the board Gavin says he has 2/10 the board left to use for another building project is Gavin correct?
Answer:
Gavin is correct
Step-by-step explanation:
Since the problem is using a denominator of 10, I will convert 1 (1 representing the full length of the board before being sawed) to a fraction over 10
1 = 10/10
Subtract everything Gavin sawed off from the board
10/10 - 2/10 - 5/10 - 1/10
Only subtract the numerators; the denominators will stay the same
8/10 - 5/10 - 1/10
3/10 - 1/10
2/10
Gavin says he has 2/10 of the board left to use
Since we concluded we still have 2/10, he is correct
A paint manufacturer wants to determine the average drying time of a new interior wall paint. For n = 50 test areas of equal size he obtained a sample mean drying time of ¯x = 63.3 minutes and a sample standard deviation of s = 8.4 minutes. (a) (5 points) Construct the 95% confidence interval for the true mean µ. (b) (5 points) Suppose the population has a normal distribution, construct the exactly 95% confidence interval for the true mean µ. (c) (5 points) Suppose the population has a normal distribution, construct the 95% prediction interval for a new observation.
Answer:
a) the 95% confidence interval for the true mean µ is 60.971, 65.629
The exact 95% confidence interval for the true mean µ is 60.971, 65.629
P (x`- ∝ s/√n<u <x`+ ∝ s/√n) = 0.95
Step-by-step explanation:
n= 50
x`= 63.3
s= 8.4 minutes
∝= 95%= ±1.96
The formula for calculating the confidence interval is:
x`± ∝ s/√n
Putting the values
x`± 1.96 s/√n
63.3 ± 1.96(8.4/√50)
63.3± 2.3287
60.971, 65.629
a) the 95% confidence interval for the true mean µ is 60.971, 65.629
b) Putting the values
x`± 1.96 s/√n
63.3 ± 1.96(8.4/√50)
63.3± 2.3287
The exact 95% confidence interval for the true mean µ is 60.971, 65.629
c) The prediction level tells that the drying time of the wall from 60.971 to 65.629 minutes must be in the range 95 % of the time.
And is given by
P (x`- ∝ s/√n<u <x`+ ∝ s/√n) = 0.95
y=3/2x-9
I need to find the x-intercept and the y-intercept with work plsss
Hi there!
x-int: (6, 0)
y-int: (0, -9)
y = 3/2x - 9
Begin by finding the x-intercept. The x-intercept is located where y = 0, therefore:
0 = 3/2x - 9
Isolate for x by adding 9 to both sides:
9 = 3/2x
Divide both sides by 3/2x:
9 * 2/3 = x
x = 6. Thus, the x-intercept is at (6, 0).
Find the y-intercept by finding the y-value at which x = 0:
y = 3/2(0) - 9
y = -9. The y-intercept is at (0, -9).
PLEASE HELPPP!!! Use the image to help u out
Answer:
Nope
Step-by-step explanation:
Linear equation : Y = Mx + C
gradient = M
Y-intercept = C
To find gradient : (y1 - y2) / (x1 - x2):
(20 - (-25)) / (-4 - 11)
45 / -15 = -3
The given gradient is however 1/3. So The given equation is wrong
If point C is the circumcenter of
APQR and the circumcenter of
APQS, then R and S must be
the same point.
true
false
Point R and S cannot be the same point
The statement is false.
What is Circumcenter?The intersection of the perpendicular bisectors of a triangle's sides is known as the circumcenter of that particular triangle. In other terms, the circumcenter is the point at which the bisector of a triangle's sides coincides.
Given:
ΔPQR and ΔPQS both have same circumcenter named C.
As, both triangles have point P and Q same but S and R are different.
There many chances that they do not overlap or Coincide, they can be sharing same base but different vertex.
Hence, R and S cannot be the same point.
Learn more about Circumcenter here:
https://brainly.com/question/29927003
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Which expressions represent the statement “three minus the product of seven and four”? Mark all that apply.
A 3 - (7 x 4)
B (7 x 4) - 3
C 3 - (4 / 7)
D 3 - (4 x 7)
E (7 x 4) - 3
The statement three minus the product of seven and four is given by the expression 3 - (7 * 4)
What is an equation?An equation is an expression used to show the relationship between two or more numbers and variables.
Given the statement three minus the product of seven and four, this is an expression:
3 - (7 * 4)
The statement three minus the product of seven and four is given by the expression 3 - (7 * 4)
Find out more on equation at: https://brainly.com/question/2972832
Please answer quick just super small explanation pls hurry quick for brainlessly answerr
Answer:
A
Step-by-step explanation:
2x/√2
2x/√2 x √2/√2 = 2x√2/2
x√2
PLssssss help me with this question!!
Answer: a. equivalent b. not equivalent
c. equivalent d. not equivalent
Step-by-step explanation:
Anthony needs some kitchen
appliances He found a mixer
for $90 and a microwave for
$42 What is the total bill
after adding 8% sales tax?
Can I please have help I will mark brainly est
Answer:
Hey mate......
Step-by-step explanation:
This is ur answer......
I believe its SQUARE! Cuz it says 4 right angles.....Hope it helps!
mark me brainliest pls.....
Follow me! :)
You borrow $1300 to buy a telescope. What is the monthly payment?
Answer:
it depends on how many months
Step-by-step explanation:
Answer:
for a year i dont understand srry
NEEDED ASAP PLZ!!!!!!!!!
The social studies teacher wants to know whether the students in the entire school prefer a model United Nations activity or a student government activity. The teacher draws a random sample from the following groups:
All teachers in the school
All boys in each grade
All students in each grade
All students in the social studies club
Which group best represents the population he should take a random sample from to get the best results for his survey? (5 points)
Group of answer choices
All teachers in the school
All boys in each grade
All students in each grade
All students in the social studies club
Answer:
All students in each grade
Can someone please just help me with 1-3 I’ll mark brainliest it’s urgent?
Answer:
In the instruction above, it gives us some helpful information.
2 days with no professional sports game.
3 forms of ratio --> a to b, a : b, a / b
1) Remember there are 365 days in a year.
Days without games to Days in a year --> 2 to 365
Days without games : Days in a year --> 2 : 365
Days without games / Days in a year --> 2 / 365
2) Now there is a plot twist. It ask days with games. To find that we need to subtract 365 - 2 = 363 days with games.
Days with games to Days in a year --> 363 to 365
Days with games : Days in a year --> 363 : 365
Days with games / Days in a year --> 363 / 365
3) Days with games to Days without games --> 363 to 2
Days with games : Days without games --> 363 : 2
Days with games / Days without games --> 363 / 2
Hope this helps and sorry for not answering you. For some reason I was not getting any notification, but it is fixed now. Thank you :) !!
How can postulates and theorems relating to similar
and congruent triangles be used to write a proof?
HELpPppPppPppPpppPppPppppppppppppppppppoopppppoppopppppppppp
Jdjxjjxx
Answer:
£140
Step-by-step explanation:
First count up the amount of full squares, then you see the partially filled squares and try find the match for it to fill the square. It ends up being 24 squares, meaning 24 square feet. That multiplied by £5, as that is the cost of red wood, gives you the answer of £140
Julie's grades for this term test are 85,88,97. What is her average?
Please give an explanation.
Answer:
90
Step-by-step explanation:
The average of a set of numbers is the sum of the numbers, divided by the count of the numbers.
Thus, the average of 85, 88 and 97 is
85 + 88 + 97
------------------- = 270/3, or 90
3
Answer:
90
Step-by-step explanation:
What is equivalent to 0 = 2x2 - 16x – 18 when completing the
square?
Answer:
x = 1
x = -9
Step-by-step explanation:
(2x2 + 16x) - 18 = 0
2x2 + 16x - 18 = 2 • (x2 + 8x - 9)
x2 + 8x - 9
-9 + 1 = -8
-3 + 3 = 0
-1 + 9 = 8
2 • (x + 9) • (x - 1) = 0
2 = 0
x+9 = 0
x = -9
x-1 = 0
x = 1
x2 + 8x - 9 = 0
x2+8x = 9
(x+4) • (x+4) =
(x+4)2
x2+8x+16 = 25 and
x2+8x+16 = (x+4)2
(x+4)2 = 25
x = -4 + √ 25
x2 + 8x - 9 = 0
has two solutions:
x = -4 + √ 25
or
x = -4 - √ 25
- B ± √ B2-4AC
x = ————————
2A
A = 1
B = 8
C = -9
B2 - 4AC =
64 - (-36) =
100
-8 ± √ 100
x = —————
2
x = ( -8 ± 10) / 2
x =(-8+√100)/2=-4+5= 1.000
or:
x =(-8-√100)/2=-4-5= -9.000
Answer: x = 1
x = -9
How much 9% saline solution should be mixed with 80 Cc of a 17% saline solution to produce a 13% saline solution?
Answer:
80 cc.
Step-by-step explanation:
We work in amounts of salt in the solutions:
0.09x + 0.17*80= 0.13(x+ 80) where x is the required volume of 9% solution.
0.09x + 13.6 = 0.13x + 10.4
13.6 - 10.4 = 0.13x - 0.09x
3.2 = 0.04x
x = 3.2 / 0.04
x = 80
Evaluate-n, when n=-4
Answer:
4
Step-by-step explanation:
-n =
-(-4) =
+4 =
4
Hope that helps!
-Sabrina
79 1/6% as a fraction
Answer:
475/6%
Step-by-step explanation:
I hope this helps.
The equivalent fraction of the percentage is A = 47401/600
What is a Fraction?An element of a whole is a fraction. The number is represented mathematically as a quotient, where the numerator and denominator are split. Both are integers in a simple fraction. A fraction appears in the numerator or denominator of a complex fraction. The numerator of a proper fraction is less than the denominator.
Given data ,
Let the fraction be represented as A
Now , the percentage value is given by P
And , the value of P = ( 79 1/6 ) %
We know that 1% is equivalent to 1/100, so we can write:
79 1/6% = 79 + 1/6% = 79 + 1/6 x 1% = 79 + 1/600
Now, we can convert the mixed number to an improper fraction by multiplying the whole number by the denominator and adding the numerator, then placing this over the denominator:
79 + 1/600 = (79 x 600)/600 + 1/600 = 47400/600 + 1/600
Combining these fractions, we get:
79 1/6% = 47401/600
Hence , 79 1/6% as a fraction is 47401/600.
To learn more about fractions click :
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Can someone help with this math problem please
Answer:
0.40p-20
Step-by-step explanation:
hope this helps.
The amount that Jimmy paid for his meals the four days, $6.45, $21.38, $1.99, $7.99, $16, $0, $7.99, $18.95, $4.30, $10.35, $18.20. Calculate the median
Answer:
$7.99
Step-by-step explanation:
Arrange numbers in numerical order: $0, $1.99, $4.30, $6.45, $7.99, $7.99, $10.35, $16, $18.20, $18.95, $21.38.
Count how many numbers you have, 11.
11 is an odd number so, the number in the middle of the data set is the median.
Final answer: $7.99 is the median.