Need some help i am lost

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

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.