Hey there!
Question #1
[tex]1.1 \ \ \ \ \ \ \ \ \ \ \ 16=2^4 \\
(160)^{-4} = (2^4) ^{(-4)} =(2) ^{(-16)} [/tex]
(Final Result)
[tex] \frac{1}{16} = 0.0002[/tex]
Question #2
Evaluate 36^3/2
Your answer: 216
Question #3
Your correct answer would be 5
Question #4
I believe that you would ( Multiply the exponent by -1)
Hope this helps, (I'm in a rush, I got to go), But they should be correct!
~Jurgen