SOLUTION: solve e^-4x=9

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Question 1117297: solve e^-4x=9
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
solve e%5E%28-4x%29=9
using natural logs
ln%28e%5E%28-4x%29%29+=+ln%289%29
the log equiv of exponent
-4x%2Aln%28e%29+=+ln%289%29
the ln of e is 1, therefore
-4x = 2.197
x = 2.197%2F%28-4%29
x = -.5493