Mackenzie brought chocolate and vanilla cupcakes to school for her birthday. 80 students decided to take a cupcake, and 72 of them picked vanilla. What percentage of the students picked a vanilla cupcake?

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