In a dog show, there will be a gold, a silver, and a bronze medal awarded. there are 5 finalists. in how many different ways can 3 medals be awarded?

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.