Answer
(a) $\sqrt{48} = 6.9282$
$4~\sqrt{3} = 6.9282$
(b) $\sqrt{\frac{7}{9}} = 0.881917$
$\frac{\sqrt{7}}{3} = 0.881917$
Work Step by Step
We can use a calculator to verify that the expressions are equivalent:
(a) $\sqrt{48} = 6.9282$
$4~\sqrt{3} = 6.9282$
(b) $\sqrt{\frac{7}{9}} = 0.881917$
$\frac{\sqrt{7}}{3} = 0.881917$