Mary decreased her time for the mile walk from 30 minutes to 24 minutes. What was the percent of change in Mary's time to walk a mile? (don't forget the % sign)

What does the relationship between the mean and median reveal about the shape of the data

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

What can you determine about the solutions of this system