a factory's production is modeled by function f(x), where f(x) is the number of parts produced per hour and x is the number of people working during production
choose the ordered pair that represents a possible domain and range of the function

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