Question

URGENT! 20 pts

ball has a diameter of 9 in. It consists of 2 parts. The inside is a spherical core with a diameter of 6 in. Surrounding the core is a layer of polyurethane. What is the volume of the polyurethane? Use 3.14 to approximate pi. Round to the nearest hundredth if necessary. Enter your answer in the box.

Answer 1

i got 2147.76

Explanation:

the real aswner is 268.47

Answer 2

volume of sphere = 4/3*pi*r^3

calculate inside and out side then subtract the 2

outside diameter = 9 radius = 4.5

4/3 *3.14 *4.5^3 = 381.51

inside diameter = 6, radius = 3

4/3 * 3.14 * 3^3 = 113.04

381.51 - 113.04 = 268.47 cubic inches