Which of the following rational exponent expressions is not simplified correctly as a radical expression ? ( answer choice in the attached)

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.