Write in Exponential Form (x^6)/(4^7 square root of y^4)

$\frac{x^{6}}{4^{7} \sqrt{y^{4}}}$

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{y^{4}}$ as $y^{\frac{4}{2}}$ .

$\frac{x^{6}}{4^{7} y^{\frac{4}{2}}}$