Lynbrook West, an apartment complex, has 100 two-bedroom units. The monthly profit realized from renting out x apartments is given by the following equation in dollars.
P(x) = -10x2 + 1,800x - 56,000
(a) How many units should be rented out in order to maximize the monthly rental profit?
units
(b) What is the maximum monthly profit realizable?

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point