A ramp into a van: Suppose a ramp is used to move a heavy object into a van. Suppose also that the van door is 18 inches off the ground. a. If the bottom of the ramp rests on the ground 4 feet from...

A ramp into a van: Suppose a ramp is used to move a heavy object into a van. Suppose also that the van door is 18 inches off the ground.

a. If the bottom of the ramp rests on the ground 4 feet from the van, what is the slope of the ramp?

b. If the ramp cannot have a slope of more than 1.2 inches per foot, how far from the van should the ramp rest?