300 is what percent of 3200

Can any one me with the answers to these questions asap?

Select the quadratic that has root x = 8 and x = -5

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.