An investor deposits $825 into a retirement account that pays 6. 5% simple annual interest. If no additional investment is made, how much interest should the investor expect at the end of 4 years?.

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)?