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September 18, 2014

September 18, 2014

Posted by **Ruth** on Monday, December 10, 2012 at 11:26am.

- algebra: logs -
**Steve**, Monday, December 10, 2012 at 11:28amIf that's log base 3,

log_3(x)=4

x = 3^4 = 81

If that's a base-10 log,

log(3x)=4

3x = 10^4

x = 10000/3

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