Mr. Thom gave his students a riddle. He reads the first clue." when you multiply a whole number by this number, it will decrease in value." Which value could represent Mr. Thom's number? 1. 3 8 II. 5 4 0.98 IV. 1.05 A. II and IV only B. I and III only C. I, II and III only D. I, II, III and IV​

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