Posted by **Scott Ingraham** on Saturday, April 12, 2008 at 12:51pm.

Can someone tell me if this is ordinary annuity of future or ordinary values sinking funds present value or what is it. The question is You are earning an average of 46500 and will retire in 10 years. If you put 20% of your gross average income in an ordinary annuity compounded at 7% annually, what will be the value of the annuity when you retire? I am using a texas instrument calculator for figuring and using formulas to do this HELP HELP

- Annuities -
**Damon**, Saturday, April 12, 2008 at 3:01pm
You put in P = 9,300 per year for n = 10 years at interest rate r = .07

You can do this as a future value of annuity or amount of a sinking fund. N is accumulated after n years.

N = P * [(1+r)^n - 1 ] / r

N = 9300 * [ (1.07)^10 - 1 ] / .07

N = 128,493

- Annuities -
**Damon**, Saturday, April 12, 2008 at 3:09pm
With my TI 83 + calculator:

type 9300

type * times key x

left paren

1.07^10 -1

right paren

enter

get 8994.5...

divide key

.07

enter

get

128492.966

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