A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 18 dollars

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A new software company wants to start selling DVDs with their product. The manager notices that when the price for a DVD is 18 dollars, the company sells 132 units per week. When the price is 31 dollars, the number of DVDs sold decreases to 89 units per week.
Write the revenue function, as a function of price Find the maximum revenue

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