Which of the following rational exponent expressions is NOT simplified correctly as a radical expression?

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?