Ben made a four digit number with the numbers 7,4,3,9. the number was smaller than 4 and bigger than 1. the 7 cannot go in the tenths place, and 9 must go to any place value to the right of the seven. what is the number?

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