If I wanted to major in business, should I apply to Emory because you are not guaranteed to get into their business...

I may be wrong but you should have a good chance of buisness admittance as retention and swapping majors is a frequent thing though major swapping works both ways. Emory has a great buisness program and if necessary you can transfer but also applying into a school not a university is actual semi normal as long as you don’t flunk college you should be fine. Think of it as a delayed admit and you really only attend Emory first as post highschool Emory buisness is the university of that helps!