When sharon began shopping this morning, she had $40.00. she purchased five paperback books and had lunch. the books were all the same price, and lunch cost $3.25. she now has $7.00 left over. what was the price of each of the books?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.