2 & 1/2 ÷ 1/8 = 20. How can you use that fact to help you solve 2 & 1/2 ÷ 5/8?

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

Complete the synthetic division problem below.what is the quotient in polynomial form 2/16 -16

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )