Question

The volume of air inside a rubber ball with radius r can be found using the function . What does represent? the radius of the rubber ball when the volume equals cubic feet the volume of the rubber ball when the radius equals feet that the volume of the rubber ball is 5 cubic feet when the radius is 7 feet that the volume of the rubber ball is 7 cubic feet when the radius is 5 feet

Answer 1

Since in this problem, we are dealing with a balloon we can now say that the container or the shape we are dealing with is a sphere. The volume of a sphere is 4/3πr³  hence the volume is directly proportional to the radius. The volume increase by a factor of r³.

I would say it represents the volume function evaluated at r=5/7, or

V(5/7)=(4/3)π(5/7)² = 2.13714

Answer 2

V(5/7)=(4/3)π(5/7)² = 2.13714                                                          hope this helps