Four online retail stores are having a sale on X trend earbuds if the original price of X treme earbuds is $80 which store is offering the best sale

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.