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Question: according to the americans with disabilities act a ramp cannot...

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According to the Americans with Disabilities Act, a ramp cannot have an incline that is greater than 5o. The regulations also state that the maximum rise of a ramp is 30 inches. When a 
ramp needs to reach a height greater than 30 inches, a series of ramps connected by 60-inch landings can be used, as shown below.

5° 30 in. 30 in. 5° 60 in.

a) What is the maximum horizontal length of the base of one ramp, in feet? Round to the nearest foot

length = ____ feet

b) If a doorway is 7.5 feet above the ground, what is the least number of
 ramps and landings you will need to lead to the doorway?

fewest ramps = _____

fewest landings = ______

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