Someone help me with what p and q equals?

On a piece of paper graph f(x)=5•(0.4)^x

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

You are looking for your first credit card. you plan to use this credit card only for emergencies and to pay the credit card balance in full each month. which credit card feature is most important? a. no annual fee b. low apr c. generous rewards program d. no balance transfer fee select the best answer from the choices provided