A medical rescue helicopter is flying at an average speed of 172 miles per hour toward its base hospital. At 2:42pm, the helicopter is 80 miles from hospital. Use this information for items 4-5. Whuch equation can be used to determine m, the number of minute it will take the helicopter to reach the hospital?

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