# math

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Two fraternities, Sig Ep and Ep Sig, plan to raise money jointly to benefit homeless people on Long Island. They will sell Yoda vs. Alien T-shirts in the student center, but are not sure how much to charge. Sig Ep treasurer Augustus recalls that they once sold 240 shirts in a week at \$5 per shirt, but Ep Sig treasurer Julius has solid research indicating that it is possible to sell 480 per week at \$2 per shirt.
(a) Based on this information, construct a linear demand equation for Yoda vs. Alien T-shirts, and hence obtain the weekly revenue R as a function of the unit price x.
(b) The university administration charges the fraternities a weekly fee of \$500 for use of the Student Center.What is the weekly profit P as a function of the unit price x?
Determine how much the fraternities should charge to obtain the largest possible weekly profit.

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