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## Homework Statement

At what rate of interest, compounded continuously, will a bank deposit double in value in 8 years?

## Homework Equations

None.

## The Attempt at a Solution

Q

_{0}e

^{8r}=2Q

_{0}

e

^{8r}=2

8r=ln(2)

r=ln(2)/8

But the answer is (25/2)ln(2)%. How do I get the answer from there?