Find the average value of the function i = 15(1 - e1/2t) from t = 0 to t = 4. a. 7.5(1 + e-2) b. 7.5(2 - e-2) c. 7.5(2 + e-2) d. 7.5(3 - e-2)

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.