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December 18, 2014

December 18, 2014

Posted by **christopher** on Saturday, April 17, 2010 at 4:26pm.

$9000 IS compounded semiannually at a rate of 11% for 20 years

- Math -
**christopher**, Saturday, April 17, 2010 at 4:32pmround to the nearest hundredths as needed

- Math -
**tchrwill**, Saturday, April 17, 2010 at 5:31pmWith compound interest, the interest due and paid at the end of the interest compounding period is added to the initial starting principal to form a new principal, and this new principal becomes the amount on which the interest for the next interest period is based. The original principal is said to be compounded, and the difference between the the final total, the compound amount, accumulated at the end of the specified interest periods, and the original amount, is called the compound interest.

In its most basic use, if P is an amount deposited into an account paying a periodic interest, then Sn is the final compounded amount accumulated where

...........Sn = P(1+i)^n

where i is the periodic interest rate in decimal form = %Int./(100m), n is the number of interest bearing periods, and m is the number of interest paying periods per year.

Sn = P(1+i)^n

Sn = 9000(1.055)^40 = $76,619.78

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