Miles work for a boat shop and needs to make atleast $200 to pay his bills this month

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Triangle xyz has vertices x(1,3), y(0,0)

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.