Question

Raphael wants to purchase an exercise ball. The dimensions state that the ball is 20 inches in diameter when at maximum capacity. How much air can the exercise ball hold when pumped to the maximum capacity? Calculate your answer using 3.14 for pi and round to the nearest tenth.(1 point)
inches3

Answer 1

Volume of a sphere: V = (4/3)πr^3.
r = 20/2 = 10 in.
V = (4/3)(3.14)(10^3) = (4/3)(3.14)(1000) = 12560/3 ≈ 4186.666...

Rounded to the nearest tenth: 4186.7 in^3.