dori Figure 5.4 Formula for Compound Interest If you have a calculator with a y' key, you can c can compute compound interest and the amount by using this formula: A = P(1.00 +r)" Where A = Amount, called the Future Value (FV) P= Principal, called the Present Value (PV) Annual Interest Rate r= Rate per period Number of Periods Per Year n = Number of periods = Number of years x Number of periods per year 28. ALGEBRA Lisa Fournier deposited $18,500 into a savings account paying 4.5% annual interest compounded monthly. What amount will she have in her account after 5 years? How much compound interest will she have earned? 29. Heather Johnson bought a new set of tires for $436.00 and a car seat for $22.85. The state tax rate is 6%, the county tax rate is 1.5%, and the city tax rate is 0.5%. What is the total purchase price? 30. Julian Nestor is ready to purchase a new stroller. It is regularly priced at $127.99. The sale price is $88.54. What is the markdown? 31. Rishi Maharan's charge account statement shows an unpaid balance of $6,752.22. The monthly finance charge is 1.85% of the unpaid balance. Rishi has new purchases of $150.75. What is the new account balance