SOLUTION: You are investing money at 8.5 percent annual interest, compounded continuously. It will take you how many years to double your investment.

Question 593328: You are investing money at 8.5 percent annual interest, compounded continuously. It will take you how many years to double your investment.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Let P be the amount initially invested. Since we want this investment to double, the final amount is A = 2P

One other thing to keep in mind is that the rate 8.5% means r = 0.085

So plug A = 2P and r = 0.085 into and then solve for t

So it will take you roughly 8.15 years to double your investment.

If your answer must be a whole number of years, then round up to 9 years.

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