Question

@iGreen 1 more after this one and then we will probably be done. Thanks again

Answer 1

A ball is made of a plastic sphere covered with a layer of rubber. The plastic sphere has a radius of 18 in., and the ball itself has a radius of 21 in.

What is the volume of the rubber layer?
Use 3.14 to approximate pi and express your final answer in hundredths.

____ in^3

Answer 2

@AnswerMyQuestions

Answer 3

If the radius of the whole thing is 21, and the plastic part is 18, subtract 21 - 18 to get the radius of the rubber layer.

Answer 4

21 - 18 = 3

Answer 5

Find the two volumes, subtract.

Answer 6

Or we could do it that way.

Answer 7

>:3

Answer 8

\(V = \dfrac{4}{3} \pi r^3\)

Plug in 3 for the radius

Answer 9

3^3 = 27

Answer 10

Yep, now multiply by 4/3 and pi

Answer 11

113.04

Answer 12

Yep, that's our answer.

Answer 13

Thanks.

Answer 14

1 more after this one and odds are we will be done. Thanks again

Answer 15

No problem.