An official ncaa basketball has a diameter of 9 in. how much leather is required to cover the ball?

They are asking of the surface area of the ball. 

Surface area of a sphere = 4 * pi * radius²

If the diameter is 9, then the radius is 4.5

4 * pi * (4.5)²
4 * pi * 16.25
65 * pi
≈ 204.2 inches

Approximately 204.2 inches of leather are needed to cover the ball. 

0.56, 3/5, 75%, 0.8

Step-by-step explanation:

0.56, 0.6, 0.75, 0.8