Demand for your tie-dyed T-shirts is given by the formula
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where p is the price in dollars you can charge to sell q T-shirts per month. If you currently sell T-shirts for $10 each and you raise price by $1 each month, how fast will the demand drop?
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A. 80 T-shirts per month
B. 20 T-shirts per month
C. 160 T-shirts per month
D. 80,000 T-shirts per month
E. 800 T-shirts per month
Answer: C
Mathematics
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