Answer
$a^{2}c^{4}$
Work Step by Step
When we raise a power to a power, we multiply the powers together and keep the base. Let's simplify this expression:
$a^{\frac{2}{3}(3)}c^{4}$
Multiply the exponents:
$a^{\frac{6}{3}}c^{4}$
Simplify the fraction in the exponent:
$a^{2}c^{4}$
