$20,000 invested at a rate of 3 compounded annually; 8 years

Can i get some on 18,20,& 22? or one of them

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

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have