Question

Please answer this (picture included) only question c

Answer 1

1.29099444874 This is the answer I came up with.

Answer 2

$\frac{ \sqrt{5 \times 3} }{ \sqrt{3} }$
$\frac{ \sqrt{5} \sqrt{3} }{ \sqrt{3} }$
$\sqrt{3}$
gets cancelled, remaining is:
$\sqrt{5}$