This document discusses the surface area and volume formulas for spheres. It defines a sphere as a set of points equidistant from a central point, and explains that the cross-section of a sphere is a circle. If the circle's center is also the sphere's center, it is called a great circle. The surface area of a sphere is given as SA = 4πr2, while the volume is V = 4/3πr3. Homework problems are assigned from page 737 involving calculating surface areas and volumes of spheres.