You can
put this solution on YOUR website!
First, raise both sides as a power of e, to undo the ln.

or
There are several ways to do the next step. I like to invert both sides of the equation. In other words, if two quantities are equal, then their reciprocals are also equal. Flip both sides:

or
Unfortunately, I left my calculator at the office today, so you'll have to do the calculation yourself.
R^2 at SCC