FA09 Test _1 MIM - Math 142 Music in Motion Exam 1...

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Math 142 Music in Motion Exam 1 Instructions: This take-home exam has 9 problems on 6 pages, and is due in class Monday September 28, 2009. You may use any written materials you want including notes, books and the internet, but you may not consult any other person in any way regarding this exam. You are to work by yourself. Do your thinking and scratch work for the problems on other paper or on a 2 nd print out of this exam (first draft). Then when you have your final solutions, rewrite them neatly and organized in the spaces provided, showing all your work. Turn in your final draft, including this signed cover sheet, on Monday at the beginning of class. By signing below, I agree that I have not received any assistance on this exam from any other person. _______________________________________________________ Signature Date
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Read carefully. Follow all directions and show ALL work. 1. Suppose that a computer can burn 3 CDs every 4 minutes. Consider the number of CDs burned, c , and the amount of time the computer is working, t , in minutes. a.Are these quantities proportional? If yes, explain why these quantities are proportional. If no, explain why not. b.Write a formula for the number of CDs burned, 2. When a certain company produces t-shirts, they pay a fixed cost plus the cost of making each shirt. They find that the total cost (including the fixed cost and cost per shirt) of producing 120 shirts is $850 and that the total cost (including the fixed cost and cost per shirt) of producing 180 shirts is $946.
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