Let a be an irrational number would 64/a be rational or

What is the volume of the sphere shown below with a radius of 3?

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).