Program: Unknown Interest Rate
By: David Billigmeier

   What this program does is determines
the exact value of the interest rate on
an ordinary annuity given PV or FV,
number of payments, and the payment
amount

HOW TO USE:
   Start the program and enter in all of
the inputs.  The program will now ask
if you want to make an initial guess for
i or use a well known formula to give a
very rough first estimate.  Enter "0" to
use the formula.  It will tell you the
first guess.
   Now the program will continue to give
better estimates each time you hit "Enter."
Hit Enter only about 5 times until you
reach the exact interest (technically
still an estimate but accurate to the
10 billionth place).
   The program uses Newtons Method for
computing the interest rate which is why
you have to give an initial guess.  This is
great for tests where you have to show 
your steps in computing.


Feel free to modify this program to better fit
your needs, open it up and check it out.  Feel
free to contact me with any questions.  You can
get a recent email address for me on my web 
page under "Contact":  www.dbpics.com