<PRE><B>Question 599893</B>
Hello, 
The formula to use is A=P(1+r/n)^(tn)
A is the amount
P is the principle (how much is started with)
r is the rate
n is the number of times in the year it is compounded
t is the time
Plug in the data:
100000=1900(1+.11/12)^t12
Divide by 1900
52.6316=(1.009)^t12
Use log
Log 52.6316=12tlog 1.009
Divide 12log 1.009 to get:
(log 52.6316)/(12log 1.009)=t
T=37 years (rounded off)
Make sense?
RJ
www.math-unlock.com</PRE>