SAT scores are normally distributed with a mean of 500 and a standard deviation of 100

A) What percent of test takers score less than 300?
B) If 300 students took the SAT test in one high school, how many scored between 600 and 700?
C) How many standard deviations from the mean is a student who earns a score of 800?
D) In what percentile is Beth, who scored 640? Round to the nearest whole percent
E) Approximately how many students in Beth's class of 300 do you expect got a higher score? round as appropriate.