book Maths Puzzle Numerical Ability

evaluate:
3log^84

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I dont understand how to do this question. Can i please get some help, with information how to answer the question aswell, thanks.

Solve the following.
5 = 9
3 2-y
( i
I am having trouble with these problems:
1. If (x,y) is in quadrant 2, where is the point ((-1)^36x, (-1)^49y)?

2. Simplify the expression -5x^0 +7

3. What is the factor of