A foot is 12 inches... so it would be a foot
The cone
and the sphere
intersect in a circle of radius
in the plane
:


In Cartesian coordinates, the volume is then given by the integral

In cylindrical coordinates, the integral is

Can you post the picture of the exercise
12.5 cups of flour are required to make 2.5 batches
X equals 7.1 if you round to the nearest tenth