i need help with these

6.1-6.3 Formulas Exponential Parent Exponential Growth Compound Half-Life Function Model Interest Function y = a . bx y = a . (1+r)' A=P. (1+ A = do 6. Ms. Danko invests $3000 in an account to earn money so that she can purchase a classroom set of the coolest graphing calculators ever. If the annual interest rate is 2.5% and the account compounds monthly, how much will the account be worth in 7 years? (3 points) r:0.025 7. Mrs. Biller buys a new SUV for her growing family. She paid $48,500 and vehicles tend to depreciate at about 17% per year. How much will the car be worth in 4 years? (3 points) 8. Miss Hurley recorded the number of cicadas in her backyard last summer. On the first day that she recorded, she noticed that there were 3 cicadas. She then found that the number of cicadas doubled each day. How many cicadas were there on the 20" day? (3 points)