G'day! I'm supposed to set up integrals and evaluate the length of the curve for three problems. I just wanted to make sure I've got the set up done right, since evaluating should be relatively easy.

So, the formula I'm using is:

a) for the curve , in the interval

I got:

b) for the curve: , in

I got:

c) for the curve: , in

I got:

Thank you very much, mates! Lemme know if you need the step in between!