How many such triangles are right triangle?

Just tell me how to set up the equation.

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.

Which statement best explains why ben uses the width hi to create the arc at j from point k