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# Lesson 5 Feb 18 2010

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### Lesson 5 Feb 18 2010

1. 1. When computer software programs sell for \$20 each 300  people will buy them. For every \$5 increase, 30 fewer  people will buy. What is the maximum revenue?
2. 2. A projectile is shot straight up from a height of 6m with  initial velocity of 80 m/s. It's height is given by the  equation h = 6 + 80t ­5t2 How much time will it take to reach it's max height?  What is that height?
3. 3. What is the maximum rectangular area that can be  enclosed by 120 m of fencing if one side of the rectangle  is an existing wall?
4. 4. What is the maximum rectangular area that can be  enclosed by 120 m of fencing if one side of the rectangle  is an existing wall?
5. 5. Exercise 6 Questions 1­ 11