Please answer these two questions:
1. The amount A, in milligrams, of a 10-milligram dose of a drug remaining in the body
reduces at a rate of 20%. Find, to the nearest tenth of an hour, how long it takes for
half of the drug dose to be left in the body.
2. After t years, the rate of depreciation of a car that costs $20,000 is 25%. What is the value of the car 2 years after it was purchased?
show work please!!