What is the mad of 88, 72, 77, 95, 65, 80, 70, 106, 65, and 68 and what the mad represents

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Name the most appropriate metric unit for each measurement

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much