book Maths Puzzle Numerical Ability

Rewrite the following without an exponent:

(-2)^-2

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book Other Question

If you have a triangle and the points are set up in a matrix what do you times that matrix by to get the tringle to move 180 degrees on the point of origin write as a single logarithm with coefficient one: 3log4x (the four is little) + 1/2log4 (the four is little) square root x

I got log4 (little four) x to the 13/4 (13/4 is an exponent) - please help...not sure if I got this or not:)