A helicopter flying 2,000 feet above the ground spots an airplane flying above. If the horizontal distance between the helicopter and airplane is 3,335 feet and the angle of elevation is 85°, find the airplane’s altitude. Round to the nearest tenth.

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min