I need help doing #1, I know how to do A, but B-I I don’t understand what exactly I’m supposed to do.

What’s the question here? what have you been learning about?

What is the last question i don’t see it?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.