To accommodate a wheelchair, a couple places a triangular ramp from the ground to the base of a doorway as shown below. Given that the base of the doorway is 15 inches directly above the ground and the base of the ramp is 36 inches, what is the length in inches of the ramp?

The ACT Mathematics Test contains 60 questions to be answered in 60 minutes.  The hardest ACT math questions (the last 10 to 15 questions) fall into two types: advanced concepts and complex questions. Advanced concepts questions cover what you learn in precalculus and trigonometry. FYI: Students that get into Harvard College have an ACT score of 34–36.