math 115

In an apartment building there is one elevator that can carry a maximum weight of 2200 pounds. The maintenance supervisor wants to move a replacement part for the air-conditioning unit to the roof. The part weighs 1500 pounds, and the mechanized cart on which it is being moved weighs 120 pounds. When the maintenance supervisor drives the cart onto the elevator, the alarm sounds to signify that the elevator is overloaded; the alarm stops when the supervisor steps out of the elevator