Daily PWN 087 – PWN Test Prep

$f(x)=x^3$
$g(x)=\sqrt{x}$
Functions $f$ and $g$ , above, are defined for all $x\geq 0$ . If $a$ and $b$ are greater than zero, and $a=b^6$ , then what does $f(g(a))$ equal, in terms of $b$ ?
A) $b^{18}$

B) $b^9$

C) $\sqrt{b^9}$

D) $b^3$

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