Answer
The binary number 01010101 equals 85 when expressed conventionally.
Work Step by Step
Reading from right to left, we see that this number has a “1” in the $2^0$ place, the $2^2$ place, the $2^4$ place, and the $2^6$ place.
We have:
$$2^0+2^2+2^4+2^6=85$$
