What is the surface area, in square inches, of a basketball that has a diameter of 9 inches?
SA of a sphere =4 x pi x r^2
Radius = Diameter / 2
Radius = 9 / 2 = 4.5 inches
SA =4 x 3.141592 x 4.5^2
SA =254.47 inches^2 - SA of a basketball.