By law, a wheelchair service ramp may be inclined no more than 4.76. if the base of a ramp begins 15 feet from the base of a public building, which equation could be used to determine the maximum height, h, of the

For this case we can model the problem as a rectangle triangle.
 We have an angle and the base of the triangle.
 To find the height we use the following trigonometric relationship:
 tan (x) = C.O / C.A
 Where,
 x: angle
 C.O: opposite leg
 C.A: adjacent leg
 Substituting values we have:
 tan (4.76) = h / 15
 Clearing h:
 h = 15 * tan (4.76)
 
 An equation that could be used to determine the maximum height, h, is:
 h = 15 * tan (4.76)