Question

PLEASE HELP ME! 5 questions, I need to know how to get to the answer, not the answer, please. =(

(If you don't know, don't answer. your just taking my points and are not helping me at all)
If you can help, please, DOO!
Thank you.
There are 5 questions.

Answer 1

first one is .6

second is -3.6105

third is -3

fourth could be either 1/4, .25, or 2^-2 (they're all the same thing though)

last one could be either 1/3, .3, or 3^-1 (they're all the same thing though)