A balloon rises to 100 feet in four minutes and 125 feet in five minutes write and solve an equation to find the distance the balloon rises in eight minutes

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.