Question

A tennis ball has a diameter of 2.7 inches. Round your answer to the nearest hundreth of an inch. Use pi = 3.14.

Answer 1

Hi Brennan! To solve your equation, you just need to find the radius of it first.

Find the radius 'r'.
The "/" sign indicates a fraction
r = d/2
r = 2.7/2
r = 1.35

Then you try to find the surface area and round your answer to the nearest hundredth of an inch.

S = 4 (pi) r^2
S = 4 (pi) (1/35)^2
S = 7.29 (pi)
S ≈ 22.89

The surface area of the tennis ball is about 22.89 in^2. Hope this helped!

Answer 2

Given:
diameter = 2.7 inches
pi = 3.14
radius = 2.7 inches ÷ 2 = 1.35 inches

If your are looking for the volume of the tennis ball. Then,

Volume = 4/3 π r³
V = 4/3 * 3.14 * (1.35in)³
V = 4/3 * 3.14 * 2.46 in³
V = 30.8976 / 3  in³
V = 10.2992 or 10.30 in³