The price of a cellphone was discounted by 25% and then discounted an additional 20%, to become
$348. What was the original price of the cellphone
before it was discounted twice?

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?