Check out the video links below for more examples on volumes of solids formed by
revolving a region about a vertical line.
http://www.youtube.com/watch?v=fNhLphUjXus
http://www.khanacademy.org/math/calculus/solid_revolution_topic/disc-method/v/washer-or-ring-method-for-vertical-line-rotation
HW: Complete the review 7.1 - 7.2. Test 7.1 - 7.2 will be Tuesday, 5/17. Final exam on 5/23.