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The Art of Problem Solving has begun selling a cookbook called "What Would Euler Eat?" If the price of the cookbook is n dollars (\(n \le 72\)), then it will sell 720-10n copies. What price (in dollars) will maximize the total revenue we receive for the books?

 

I managed to get 12960 but that wasn't correct...

 Apr 28, 2020
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Your answer, 129,600, is the total amount of money earned, not the price per cookbook.

The vertex of the parabola occurs at (360, 129600).

The answer that you want is the 360. [A rather expensive book!]

 Apr 28, 2020

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