SOLUTION: I am asked to evaluate without a calculator and I don't know where to begin? log .0001

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Question 145725: I am asked to evaluate without a calculator and I don't know where to begin?
log .0001
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Well, you could begin by recalling that: Log%5Bb%5D%28x%29+=+y means b%5Ey+=+x and that Log%5Bb%5D%28x%5En%29+=+n%2ALog%5Bb%5D%28x%29 and that Log%5Bb%5D%28b%29+=+1
Also, 0.0001+=+10%5E%28-4%29
Now let's see what all of this has to do with your problem:
Log%5B10%5D%28.0001%29+=+Log%5B10%5D%2810%5E%28-4%29%29=-4%2ALog%5B10%5D%2810%29+=+-4%281%29 = -4