申論題內容
1. City and Country Cycles finds that if it sells x racing bicycles per month, it’s costs will be C(x) = 20x+72,000 and its revenue will be R( x ) = −3 x 2 + 1,800 x (both in dollars). a. Find the store’s break-even points. b. Find the number of bicycles that will maximize profit, and the maximum profit.
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