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Combing Powers with Fractional Bases

GMAT-RVLGMY

Which of the following expressions is equivalent to
$ (\cfrac{1}{27})^4(\cfrac{1}{9})^5 $?

A

$(\cfrac{1}{3})^{20}$

B

$(\cfrac{1}{3})^{21}$

C

$(\cfrac{1}{3})^{22}$

D

$(\cfrac{1}{3})^{23}$

E

$(\cfrac{1}{3})^{24}$