and rises 3500 vertical feet above the surrounding plain A cable car is to be installed that will travel from a point 810 ft from the base of the mountain to the top Find the shortest length of cable needed Your answer is ft 3 pts 1 Details To estimate the height of a building two students find the angle of elevation from a point at ground level down the street from the building to the top of the building is 31 From a point that is 200 feet closer to the building the angle of elevation at ground level to the top of the building is 51 If we assume that the street is level use this information to estimate the height of the building Question 21