All of the following are equivalent to 2(2 a+ b) + 8 except a. 4a + 2b + 8 b. 2 (2a + b + 4) c. 4 ( a + b + 2) d. 4a + 2 (b+4)

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.