SOLUTION: please explain how to perform this Evaluate or simplify the expression log 0.0001

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Question 139256: please explain how to perform this
Evaluate or simplify the expression
log 0.0001

Answer by SnowXclouD(11) About Me  (Show Source):
You can put this solution on YOUR website!
log 0.0001
--> log 10^-4
--> because of the log is base 10, the log and 10 cancels out. Moreover, the properties of logarithm allow us to move the exponent to the front therefore you will get -4log10. After the log and 10 cancels out, you ended up with -4.
-->Therefore, after the evaluation, the solution is -4.