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3 years ago

A cylinder has a radius of 40 ft and a height of 17 ft. What is the exact surface area of the cylinder?

1 answer:

Ivan3 years ago

5 0

2 pi r h+2 pi r squared

2 x pi x 40 x 17 = 4272.566009

2 x pi x 40 squared = 10053.09649

so 4272.566009 + 10053.09649 = 14325.6625

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. What number is half way between –9 and + 3. first one who gets this get brainliest

strojnjashka [21]

We see the numbers on a number line

_____|___|___|___|___|___|___|___|___|___|___|___|___|____>
-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3
<______________________________|_________>
9 3
You need to add both distances

|-9| + 3 = 9 + 3 = 12

half
12 : 2 = 6

Now , we measure the distance towards the center section
1 way
-9 + 6 = -3
2 way
3 - 6 = -3

Answere : -3

_____|___|___|___|___|___|___|___|___|___|___|___|___|____>
-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3
<___________________|____________________>
 6 6
we used the average math
| - 9 | means that the assumed value of -9 9 (positive )

4 0

3 years ago

Read 2 more answers

Michael has $1,000.95 in his checking account. He is going to spend $472.87 on a new television, and he will spend the rest on s

Flauer [41]

Answer:

C bc 48 is the cost of sneakers, x is the number of sneakers, that plus the tv has to be less than 1000.95

8 0

3 years ago

A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is kn

loris [4]

Answer:

95 percent confidence interval for μ is determined by

(60.688 , 69.312)

a) be the same

Step-by-step explanation:

Step (i):-

Given data a random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph.

The sample size is n= 121

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

Step (ii) :-

Given The 95 percent confidence interval for μ is determined as

(61.08, 68.92)

we are to reduce the sample size to 100 (other factors remain unchanged) so

given The sample size is n= 100

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

Step (iii):-

95 percent confidence interval for μ is determined by

$(x^{-} - 1.96\frac{S.D}{\sqrt{n} } , x^{-} + 1.96 \frac{S.D}{\sqrt{n} } )$

$(65 - 1.96\frac{22}{\sqrt{100} } , 65 + 1.96 \frac{22}{\sqrt{100} } )$

(65 - 4.312 ,65 +4.312)

(60.688 , 69.312) ≅(61 ,69)

This is similar to (61.08, 68.92) ≅(61 ,69)

Conclusion:-

it become same as (61.08, 68.92)

4 0

3 years ago

Can anyone find out what this is?

Charra [1.4K]

Answer:

Expression D

Step-by-step explanation:

all other answers are above 15! hope this helps :D

4 0

2 years ago

The FDA recommends that Americans get on average 3,000mg of salt in their daily diet. Suppose that you are interested in testing

gavmur [86]

Answer:

Null hypothesis; H0: μ = 3000

Alternative Hypothesis; Ha: μ ≠ 3000

Step-by-step explanation:

We are told that the FDA recommends that Americans get on average 3,000mg of salt in their daily diet.

Now we want to test this claim of whether Americans truly get an average of 3,000mg of salt in their daily diet.

Thus, the hypotheses is as follows;

Null hypothesis; H0: μ = 3000

Alternative Hypothesis; Ha: μ ≠ 3000

5 0

3 years ago