Answer
$1110111101$
Work Step by Step
Replace each hexadecimal digit with its equivalent 4-digit binary form. Add zeroes to the front of the binary value if necessary to create a 4-digit number.
$3_{16}=3_{10}=2^1+2^0=11_2=0011_2$
$B_{16}=11_{10}=2^3+2^1+2^0=1011_2$
$D_{16}=13_{10}=2^3+2^2+2^0=1101_2$
$\ \ \ \ 3\ \ \ \ \ B\ \ \ \ \ D$
$\overbrace{0011}\overbrace{1011}\overbrace{1101}$
