An adult takes 600mg of ibuprofen. each hour, the amount of ibuprofen in the persons system decreases by about 29%. about how much ibuprofen is left after 5 hours

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?