The school gets $5 for each t-shirt they sell at a fundraiser. they have a goal of raising $150. if $45 has been raised so far, how many more t-shirts do they have to sell

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.