SOLUTION: 10^-t=5

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Question 30837: 10^-t=5
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
10%5E%28-t%29+=+5
1+%2F+10%5Et+=+5
cross multiply
5+%2A+10%5Et+=+1
divide both sides by 5
10%5Et+=+1%2F5
take the log(base 10) of both sides
t+=+log+%281%2F5%29