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A sporting goods store finds that if it sells x exercise machines per day, then its costs will be C ( x ) = 100 x + 2400 and its revenue will be R (...

A sporting goods store finds that if it sells x exercise machines per day, then its costs will be C(x) = 100x + 2400

 and its revenue will be R(x) = −2x2 + 260x

 (both in dollars).(a) Find the store's break-even points.

 (smaller value) =

(larger value)=

(b) Find the number of sales that will maximize profit, and find the maximum profit.

number of sales =

machinesmaximum profit    $

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