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Geometry

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Radicals: Simplifcation/Addition

GEOM-LLYHHR

Express the sum in simplified radical form.

$$\sqrt {24}+ 3\sqrt {6}+5\sqrt {54}$$

A

$20\sqrt {6}$

B

$8\sqrt {84}$

C

$16\sqrt {21}$

D

$20\sqrt {18}$

E

$60\sqrt {2}$