PLEASE HELP ME :(( ILL GET BRAINIEST

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?

You borrow $15000 to buy a tractor. the simple interest rate is 4%. you pay the loan off after 8 years. what is the total amount you paid for the loan