Answer
(a) 14
(b) 4
(c) 6
Work Step by Step
(a) $\sqrt{7}\sqrt{28}=\sqrt{72*8}=\sqrt{196}=14$
(b) $\frac{\sqrt{48}}{\sqrt{3}}=\sqrt{\frac{48}{3}}=\sqrt{16}=4$
(c) $\sqrt[4]{24}\sqrt[4]{54}=\sqrt[4]{24*54}=\sqrt[4]{1296}=6$
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