ACT Problem 18
$$\begin{array}{lcl} 18.\:If\:(4a)^{2}=64,\:then\:a=\:?\\ \\ (F):2\\ (G):5\\ (H):12\\ (J):4\\ (K):3\\ \end{array}$$
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Menu$$\begin{array}{lcl} 18.\:If\:(4a)^{2}=64,\:then\:a=\:?\\ \\ (F):2\\ (G):5\\ (H):12\\ (J):4\\ (K):3\\ \end{array}$$