Question 151942
(-6*x^-2*y)^-2 
 = (-6y/x^2)^-2
 = (36y^2/x^4)^-1 
 = 1/(36y^2/x^4)
 = x^4/36y^2
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(9x^6)^3/2
 = (3x^3)^3
 = 27x^9
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log( base 7) (square root of 7) 
 = (1/2) log(base 7) 7
 = (1/2) 1
 = 1/2
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log(.1)
 = log (1/10) 
 = log1 - log10
 = 0 - 1
 = -1
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Cheers,
Stan H.