The formula for the volume of a sphere is upper v equals four thirds pi r cubedv= 4/3πr3, where r is the radius of the sphere. the steel ball to the right is in the shape of a sphere and has a diameter of 3030 millimeters. a. find the exact volume of the sphere. b. find a 2-decimal-place approximation for the volume.

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?