The Benton family wants to put a circular fence around their pool. They want it to be exactly 15 feet from the center of the pool. How many feet of fencing is needed?

A. 92

B. 94

C. 47

D. 30

The answer is B. 94

The perimeter of a circle is:

P = 2 π r

The distance from the center of the pool to the fence is actually a radius of the circle:

r = 15 ft

P = 2 * 3.14 * 15

P = 94.2 ft² ≈ 94 ft²