We completed example 5 from our 3.7 Notes packet.
Here are a few more optimization videos to watch for extra help:
http://www.khanacademy.org/math/calculus/differential-calculus/v/optimization-with-calculus-1
http://www.khanacademy.org/math/calculus/differential-calculus/v/optimization-with-calculus-2
http://www.khanacademy.org/math/calculus/differential-calculus/v/optimization-with-calculus-3
http://www.khanacademy.org/math/calculus/differential-calculus/v/optimization--example-4
Homework: Complete book assignment 3.7 & WS 3.7 do 1 - 8.