Calculus
posted by Anonymous .
The manager of a large apartment complex knows from experience that 80 units will be occupied if the rent is 460 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 10 dollar increase in rent. Similarly, one additional unit will be occupied for each 10 dollar decrease in rent. What rent should the manager charge to maximize revenue?

Calculus 
Steve
Let n be the number of $10 increases in rent. Total revenue = (# units)(rent)
=(80n)(460+10n)
=36800 + 340n  10n^2
has a max at 17
so, rent = 460170 = 290 
Calculus 
Anonymous
The manager of a large apartment complex knows from experience that 80 units will be occupied if the rent is 360 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 10 dollar increase in rent. Similarly, one additional unit will be occupied for each 10 dollar decrease in rent. What rent should the manager charge to maximize revenue?
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