Binary number 1001001 is equivalent to the decimal number:

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answer is B.

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Detailed Solution

$\begin{array}{l} \overset{6}{1} \overset{5}{0} \overset{4}{0} \overset{3}{1} \overset{2}{0} \overset{1}{0} {\overset{0}{1}}_{(2)} = 1 \times 2^{6} + 0 \times 2^{5} + 0 \times 2^{4} + 1 \times 2^{3} + 0 \times 2^{2} + 0 \times 2^{1} + 1 \times 2^{0} = 73 \end{array}$

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