Answer
010010101101111110000011
Work Step by Step
You can convert the hexadecimal number to binary by converting each individual digit to the 4 bit binary representation in order
$4 = 0100, A = 1010, D = 1101, F =1111,8 =1000, 3= 0011$
Putting each of these terms in order gives you the binary number
$010010101101111110000011$