Estimate 86 x 904 plz answerrr fastt

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

Issof claims that the scale factor is 1/2. which statement about his claim is correct

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.