Radical to Exponential Form

How can the expression [math]^8\sqrt{a^c}[/math] be rewritten using a rational exponent?
[list=1][br][*]Identify the numerator of the rational exponent.[br][*]Identify the denominator of the rational exponent.[br][*]Rewrite the expression in the form [math]\text{base}^{\frac{power}{root}}[/math], where the base is the quantity raised to a power and of which the root is being taken.[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on their resources.

Information: Radical to Exponential Form