Thanks for the offer! The exam is tomorrow (today is another) so there isn't a lot of time to prepare anymore. I'll just be writing a page of notes that we can take to the exam as a cheat sheet. Still, if something comes up, I might just ask you.
Thanks for the offer.
OP didn't say USA but America. How many people live in north, central and south America? 3,5 billion still seems off but not by as much.