The perimeter of a rectangle is calculated by adding together the measurements of all four sides. For a given rectangle, the length measures
twice the width. If the rectangle's perimeter is 48 in, what does the length
measure in inches?

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.