Sweet t purchased a new pair of jeans to wear to the battle of the brands on sale at 40% off. he save $20. what was the regular price of the jeans?

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.