Question 187473
Use mental math to solve each equation.
please help with these.. i have a really hard time understandin them.. your help will help me a bunch;] thanks 


2^x=1/8 
x = -3
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10^6x=1 
x = 0
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log4^2=x ( i got 1.204, but im not sure about it)
That's from a calculator, which is not mental math.
I suspect it should be
{{{log(4,2) = x}}} Log of 2, base 4
x = 1/2 
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solve 5^2x=125 
x = 1.5