Frank's recipe for cookies calls for 3/4 cup of sugar 20 1/2 cup of flour and 3 eggs if he wants to use half as much sugar and then triple the recipe size how much sugar will he need

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.