Answer:
44.7 seconds
Explanation:
The volume of a sphere is given by the formula ...
V = (4/3)πr³
For the given radius, the volume of the ball is ...
V = (4/3)π(4 in)³ ≈ 268.08 in³
At an inflation rate of 6 in³/s, the time required to deliver that volume is ...
(268.08 in³)/(6 in³/s) ≈ 44.68 s
It will take 44.7 seconds to inflate the ball.