Sally travels to work by train every day. The probability that her train will be late on any day is 0.16 a) Complete the probability tree diagram for Thursday and Friday b) Work out the probability that her train will be late on at least one of these two days.

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