How much air is needed to fill a basketball with a diameter of 9 inches use 3.14 for pi. A. 381.5 b. 3,052.1 c. 190.8 d. 113

1 answer

The volume of a sphere is given by the formula V = (4/3) * π * r^3, where r is the radius of the sphere.

Given that the diameter of the basketball is 9 inches, the radius (r) would be half of the diameter, so r = 9/2 = 4.5 inches.

Plugging in the values into the formula, we get:
V = (4/3) * 3.14 * (4.5)^3
V = (4/3) * 3.14 * 91.125
V = 380.886 in^3

Therefore, approximately 381 cubic inches of air would be needed to fill the basketball.

The closest option is A. 381.5.