Find the amount of interest earned by a deposit of $2450 for 6.5 years at 5.25% compounded quarterly. 

Suppose Susan Gorn invested $5000 in a savings account that paid quarterly interest. Aer 6 years the money had accumulate to $6539.96. What is the annual interest rate?

 

Alicia Garcia wants to borrow $8000 from Robin Marn. She is willing to pay back $8180 in 6 months. What interest rate will she pay?

 

Suppose $1000 is deposited at the end of each year for the next 6 years in an account paying 8% per year compounded annually. How much will be in the account at the end of this period?