SOLUTION: If 12,000 is invested at an interest rate of 18 % per year compounded continuously, how long will it take for the money to double? Help, they threw me a curve ball with this one

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Question 220944: If 12,000 is invested at an interest rate of 18 % per year compounded continuously, how long will it take for the money to double?
Help, they threw me a curve ball with this one.
Answer by rfer(10417) About Me  (Show Source):
You can put this solution on YOUR website!
that is a tough one.
I played around a little and came up with 3.855 yrs
A=12000(2.7183)^.18*3.855
A=12000(2.00151549)
A=24018.19
not exact science, but close.