You have invested in a plot of land and have turned it into a campground
to rent out space to campers. You need to decide what to charge your
customers. You will charge somewhere between $40 and $150 per
campsite. If you charge dollars per day, it has been found that the
number, , of campsites rented per day can be modeled by the function
() = −0.01^2 − 2x + 600. How much should you charge to maximize your
revenue, ?