Let’s try another one. a bag contains 36 red, 48 green, 22 yellow, and 19 purple blocks. there are 125 blocks in the bag. you choose one block from the bag at random. what is the theoretical probability of choosing a purple block from the bag?

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