Violet earned a score of 662 on Exam A that had a mean of 550 and a standard deviation of 40. She is about to take Exam B that has a mean of 550 and a standard deviation of 40. How well must Violet score on Exam B in order to do equivalently well as she did on Exam A? Assume that scores on each exam are normally distributed.

than do 23.50 times 18 and then divide your answer by 100 than you will get x.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.