Phil bought 700 shares of a company’s stock for $9. 29/share. He pays a broker a commission of $18 to buy and sell stock. After one year, he sold all his shares, which were worth $9. 90/share at that time. What was his rate of return?.

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)?