Aball pit at a entertainment center contains 2120 balls. it the machine must be run 8 times to clean all the balls, how many balls fit in the machine at once?

Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.71 with a standard deviation of $0.10. using chebyshev's theorem, what is the minimum percentage of stores that sell a gallon of milk for between $3.41 and $4.01? round your answer to one decimal place.