The SAT mathematics scores (1,664,479 students) in 2012 are approximately normally distributed with a mean of 514 and a stard deviation of 117.
a. Bob achieved a score of 700 on the test. How many standard deviations away from the mean is his score of 700?
b. what percentage of those who took the test scored higher than Bob?
** please explain how you got the answer, Thank you in advance**
