Plot the following points on a coordinate grid and find the area of the figure (4,3); (-2,3); (-2,-1); (4,-1)

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.