Answer:
option C:
10000001₂
Explanation:
the number 129 in base two will be represented by using 8 bits, the values for the bits is written as,
2⁷ 2⁶ 2⁵ 2⁴ 2³ 2² 2¹ 2⁰
128 64 32 16 8 4 2 1
1 0 0 0 0 0 0 1
as for the number 129 in binary or base two representation we only need two bits as,
128 + 1 = 129
thus, the base two representation for 129 is,
10000001₂