Correct. Rewrite the expression as a radical. The denominator of the fraction determines the root, in this case the square root.

$\displaystyle{{49}}^{{\frac{{1}}{{2}}}}=\sqrt{{{49}}}\usepackage{cmbright}\Huge\$

Find the square root and simplify.

$\displaystyle\sqrt{{{49}}}=\sqrt{{{7}\cdot{7}}}=\sqrt{{{{7}}^{{2}}}}={7}\usepackage{cmbright}\Huge\$