Wiki is the correct answer
A benefit, profit, or value of something that must be given up to acquire or achieve something else. Since every resource (land, money, time, etc.) can be put to alternative uses, every action, choice, or decision has an associated opportunity cost<span>.</span>
All of the answers above are correct
16 in Binary is ob10000
32 in Binary ob100000
I'm not sure if those are in 8 bit or not.