Answer
$$\frac{5\sqrt 3}{3}$$
Work Step by Step
$$\frac{5}{\sqrt 3}$$
To rationalize you have to multiply by $\frac{\sqrt 3}{\sqrt 3}$
$(\frac{5}{\sqrt 3})( \frac{\sqrt 3}{\sqrt 3})$
$\frac{5\sqrt 3}{3}$
So when you multiply it you wliminate the square root in the denominator.