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Function: require_once
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Function: require_once
The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 400 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 4 dollar increase in rent. Similarly, one additional unit will be occupied for each 4 dollar decrease in rent. What rent should the manager charge to maximize revenue? Answer:
$
?[Recall: Revenue is the product of price per unit and number of units rented.]