Answer
$13$
Work Step by Step
The expanded form of $1101_{\text{two}}$ is:
$=(1 \times 2^3) + (1\times 2^2)+(0 \times 2^1) + (1 \times 1)
\\=(1\times 8) + (1 \times 4)+0 + 1
\\=8 +4 + 1
\\=13$
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