Maximizing Profits $An$ apartment complex has $100$ two$-$bedroom units. The monthly profit $(in$ dollars$)$ realized from renting out $x$ apartment units $is$ given $by$ the

following function.

$P(x)=-10x^2+1,740x-40,000$

$To$ maximize the monthly rental profit, how many units should $be$ rented out?

units

What $is$ the maximum monthly profit $(in$ dollars$)$ realizable?