Easy math please help

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.

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.

Find the area of the shaded region.