Hi I am in the middle of this question and im not sure if a. im right or b. where to go from here.

Q. Evaluate:

$\displaystyle \int \frac{s}{\sqrt{s^2+4^2}}$ between the limits of 3 and 0

So far I have:

$\displaystyle \int \frac{s}{\sqrt{s^2+4^2}}$

$\displaystyle let.P =\sqrt{s^2+4^2}$ then $\displaystyle dp = \frac{s}{\sqrt{s^2+16}} ds$

when S = 3 then P = 5

and

when S = 0 then P = 4

Am I right so far, if so what is the next step?

thanks