Pls help ill mark brainliest I dont have much points

The radius of a sphere is 3 inches. which represents the volume of the sphere?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?