You notice that there are a lot of hot days in the city where you live. You gather data on the temperatures throughout the year. Let X be the average temperature on a given day. The distribution of X is below. x n 60 70 80
p n 0.3 0.2 0.5
What temperature can you expect for next Sunday, a potential beach day?

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