Amovie theater sold a total of 520 adult and child tickets on a certain day. the theater sold 2.25 times as many adult tickets as child tickets. each adult ticket cost $9 and each child ticket cost $3. how much revenue did the theater generate in ticket sales that day?

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