# Rates of Change in business

1. Homework Statement
A Real estate office manages 50 apartments in a downtown building. When the rent is $900 per month, all the units are occupied. For every$25 increase in rent, one unit becomes vacant. On average, each unit requires \$75 in maintenance and repairs each month. How much rent should the real estate office charge to maximize profits?

2. Homework Equations

3. The Attempt at a Solution

I really don't know how to go about this. what is the revenue? i mean obviously the price to rent x # of rooms rented. But yea....I really don't know

the Cost = 75x