Given that (81times 2^{2n2} = K, find sqrt{K})

A.
(4.5times 2^{n}) 
B.
(4.5times 2^{2n}) 
C.
(9times 2^{n1}) 
D.
(9times 2^{2n})
Correct Answer: Option C
Explanation
(K = 81 times 2^{2n – 2})
(sqrt{K} = sqrt{81 times 2^{2n – 2}})
= (9 times 2^{n – 1})