I'm new here, and want to ask a question about the questions. Would that be at "meta," and if so, how do I access it?
"Why are there so many already answered questions in the 'unanswered' section?"
As the text on the "Unanswered Questions" tab explains, that listing is of questions with no upvoted or accepted answers:
There may be questions which have therefore received one or more answers, but these answers have neither attracted the approval of the original poster or other members of the community. The system "bumps" those questions periodically in the hopes of attracting new attention.
There are also cases where the original poster receives an answer from elsewhere, or from a comment. The "question" is "answered," but in terms of the Stack Exchange system, unless an answer is posted in the Your Answer box and either accepted or upvoted, it may as well not exist.