twiddles

what is an equation for a sine curve with amplitude 2, and period 4pi radians?

I'm a bit confused as to what I would use for this sentence: The first in line at the theater were ____ Would it be "them" or "us"? Along with: Karina and ___ are working together to build the model. 1) her 2) me 3) she 4) us If you could explain to me wh...

So the first sentence, instead of "us" or "them" would rather be "she and him"? Also, that means the second is correct?

For the first one it doesn't really give an exact subject pronoun that stands by itself. If I were to choose "she" it would have to be paired with "she and him" Haha forgot to say which one was the second! woops!! :) The second I'm pretty sure is "Karina...

Getting a little hostile, no? Was just saying how the answer was given to me; wasn't denying your knowledge. However, you did help! :) Thank you, have a nice evening (or night!)