If you are talking about the 4 on top of the other 4 it means that there are 4 beats in a measure. if you are talking about the f at the bottom that means forte, or loud (play loud)
Go back and review old notes from earlier in the year, maybe have a friend help you remember key words from previous classes, but most importantly, don't freak yourself out buy the idea of a "scary test" and just breathe. Hope this helps! :)
Answer:
10/10
Explanation:
very cool i like it a lot