Answer
$4$
Work Step by Step
RECALL:
(i) $a^{\frac{1}{3}}=\sqrt[3]{a}$
(ii) $\sqrt[3]{a^3}=a$
Use rule (i) above to obtain:
$=\sqrt[3]{64}$
Write 64 as $4^3$:
$=\sqrt[3]{4^3}$
Use rule (ii) above to obtain:
$=4$