Remember the purpose of these last two weeks is to a) TAKE YOUR ACC TEST! and b) just revel in the beauty that is math, especially in re: Conic sections. This is an interesting one - it is fairly simple to find the volume of a sphere using calculus, and we don't discuss the derivation of this until calculus because... you need calculus. But archimedes figured it out well before we had calculus to work with. So how did he do it?