Lesson 6 Regular Annuities-Future Value June 6th, 2011
An Annuity is a series of equal deposits or payments made at regular intervals of time. R= payment amount/deposit i = interest rate per compounding period n = total number of compounding periods or number of payments This formula looks at ordinary, simple annuities and it is called “the amount” formula. It is also known as the “future value” formula.
We can use the amount/future value formula when: The payment interval is the same as the compounding period A payment is made at the end of each compounding period The first payment is made at the end of the first compounding period.
a) How much will Jackie have in her account in 2.5 years? A=? R= 250 EX1: Jackie invests $250 every 3 months into an account that earns interest at rate of 5%/a compounded quarterly. a) How much will Jackie have in her account in 2.5 years? A=? R= 250 i= n=
b) How much interest did Jackie earn?
a) How much will Michael have to spend on a car? A=? R=325 EX2: Michael is saving up to buy a car. Over the next 4 years, Michael will make monthly deposits of $325 into an account that earns interest at 3.9%/a compounded monthly. a) How much will Michael have to spend on a car? A=? R=325
b) How much interest did he earn?