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Hi Nick, I also am confused by the word compare. To help with interprret however I would draw a graph of r(s) = 10 s^{2} + 1500 s. Notice that r(0) = 0. Is there another value of s so that r(s) = 0? Can r(s) be negative for some values of s? Does the revenue continue to increase as the price s increases? Can r(s) be negative for some values of s? Penny  


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