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12345 [234]
3 years ago
14

I need help with these questions asap

Mathematics
1 answer:
AfilCa [17]3 years ago
4 0

Answer:

43

Step-by-step explanation:

90-47=43

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To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. the sample mean i
Rzqust [24]
The 99 percent confidence interval for the population mean is found from:
\bar{x}-2.576\frac{s}{ \sqrt{n} }\ \textless \ \mu\ \textless \ \bar{x}+2.576\frac{s}{ \sqrt{n} }
850-2.576\frac{54}{ \sqrt{36} }\ \textless \ \mu\ \textless \ 850+2.576\frac{54}{ \sqrt{36} }
The answer is:
826.82\ \textless \ \mu\ \textless \ 873.18
3 0
3 years ago
Angela decided to make a pen for her dog that is 6 feet wide and 9 feet long. However, after looking at the place where she want
Dafna11 [192]
The answer would be D. This is because the perimeter of the first one 6+6=12 and 9+9=18 then add those together to get 30. Now we have the first perimeter you take 30 then subtract 3 twice to get 24. Now take 24 and divide it by 2 to get the length which is 12 aka D
6 0
2 years ago
8. A number is of another number. The difference of the numbers is 18. (Assume that you are subtracting the
bezimeni [28]

Answer:

Step-by-step explanation:

"A number is<u> [WHAT?] </u>of another number."  It appears the <u>WHAT??</u> is missing.  If it is a word such as "twice," it can be solved in this fashion.

Let the numbers be X and Y, with Y the larger number.

A number is <u>twice</u> another number:  Y = 2X

The difference of the numbers is 18:  Y - X = 18

Use the first equation (Y = 2X) in the second by replacing "Y" with (2X):

Y - X = 18

2X - X = 18

X = 18

Y = 2X, so Y = 36

5 0
3 years ago
A fair die is rolled 5 times. What is the probability of rolling a three at least once
Nata [24]

Answer:

0.83333333

Step-by-step explanation:

since usually if a dice is rolled 6 times. the probability of rolling a three would be 1/6th as there are even sides on a dice and even probabilities. You would divide 5 by 6 instead of 6 by 6 meaning that the probability is 0.83333 recurring

3 0
3 years ago
Read 2 more answers
A scientist measures the angle x and the distance y between the Earth and the Sun. Using complete sentences, explain how the sci
yanalaym [24]

Answer:

The scientist can use only the angle x and the distance y to calculate the distance between the Earth and the Sun using the cosine function.Step-by-step explanation:

The cosine of an angle is equal to the ratio of the length of the adjacent side and the length of the hypotenuse. In equation form:

cos x = BC / y

Solving for BC

BC = y cos x

BC is the distance between the Earth and the sun

6 0
3 years ago
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