The Smiths are moving across the country . Mr. Smith leaves 3 hours before Mrs. Smith . If he averages 55 mph and she averages 65 mph , how many hours will it take Mrs. Smith to catch up to Mr. Smith ?

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.