How does the average rate of change of the function change across the interval 0 ≤ x ≤ 20?

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.

With number 11 ( show how you got the answer)

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?