What is the probability that the 1st name Mr. Smith selects is a boy AND the second name he picks is also a boy? (he cannot pick the same student twice) Answer in a fraction AND a percent.

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.