Myra has already read 4 pages, and she knows she can read 20 more pages during every additional hour she spends reading. In all, how many hours of reading will Myra have to do this week in order to have read a total of 44 pages

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.