Ok sure, but that doesn't change anything. The old Roanoke colony (in what is now North Carolina) and the current city or Roanoke (in what is now Virginia) are still two distinct places that have nothing to do with each other, beyond the name.
It should still be accepted as an abbreviation. There are old US songs that use the term Yank as well. E.g. "I'm a Cranky Old Yank in a Clanky Old Tank" by Hoagie Carmichael.
In many cases it is, but the specific quote in the Declaration of Independence uses "unalienable." The two are interchangeable anyway, and I'm sure if this weren't an A to Z quiz specifically looking for a U answer, inalienable would be accepted.
Xerox weren't the first photocopiers. Photostat machines were available since 1912. Xerox machines were faster and cheaper to operate and, as the name suggests, used a dry process which was a big improvement.
Trivia: In what year did that musical debut? It's not 1976 - for both the Broadway version (1969), and the movie (1972).