Vertical Distance Between Curves As a Function of x

I explain how to write a function for the vertical distance between 2 curves as a function of x. We are practicing problems like this to prepare for finding volume by disk method in Calculus 1 as shown in this video:    • Volume of Solid of Revolution Disk Method ...   Check out http://www.ProfRobBob.com, there you will find my lessons organized by chapters within each subject. If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob