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McGraw Hill Integrated II, 2012 View details

Practice Test

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Exercise 10 Page 875

Use the formula for the circumference of a circle to find its radius.

About 29.19 cubic inches

A regulation softball can be modeled by the following sphere with a circumference of C=12 inches.

Let r denote its radius. We know that the circumference of the ball is 12 inches. We are asked to find its volume. First, let's find r using the formula for the circumference of a circle.

C=2π r

Substitute

C= 12

12=2π r

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Solve for r

RearrangeEqn

Rearrange equation

2π r=12

DivEqn

.LHS /2π.=.RHS /2π.

r=12/2π