Compound Interest

What does the P stand for in this formula?

What does the r stand for in this formula?

What does the n stand for in this formula?

Emily’s parents put $1,500 in her bank account for college tuition. At an interest rate of 8.25% compounded semiannually,what will be the balance after 18 years?

Mark took a loan out for $25,690 to purchase a truck. At an interest rate of 5.2% compounded monthly, how much total will he have paid after 5 years?

Olivia would like to buy some new furniture for her home. She decides to buy the furniture on credit with 9.5% interest compounded quarterly. If she spent $7,400, how much total will she have paid after 8 years?

Johnny takes an undisclosed sum of money and deposits it in a bank at an interest rate of 2%. He leaves the money in the account for 6 years, compounded quarterly. If the Johnny withdraws after 6 years is $455,125, what was the sum of money he deposited?

Karla invested $1,000 in savings bonds. If the bonds earn 6.75% interest compounded semi-annually.

Which exponential equation can be used to find how much money Karla will earn in 15 years?

Morales Bank offers you 3.9% interest compounded monthly. How long will it take for your money to triple if you use Morales Bank?