9/2 - 23/9=? plss help ​

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 unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters

How much is $1200 worth at the end of1 year,if the interest rate is 5.5% is compounded quarterly.