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Evaluate (111two)2 and leave your answer in base 2...

Evaluate (111two)2 and leave your answer in base 2

A.

111001two

B.

110001two

C.

101001two

D.

10010two

Correct answer is B

(111two)2=(111two)(111two)=1×22+1×21+1×20=4+2+1=7ten(111two)2=7×7=49249224R1212R026R023R021R10R1=1100012