2) If they thought you needed some extra prep, they would have informed you (I know some Sociology majors who got admitted contingent on their passing accounting and basic math undergrad courses).
As an Education major who was asked to take a calculus class as a condition of my acceptance, I can vouch for this! The only thing that I can recommend would be to maybe look at a couple of accounting books if you never done financial accounting. I actually took an accounting class (as an elective) in undergrad and I tell you what, it was one of the best decisions of my life. Finance and stats just use basic math, but for a lot of folks, accounting is so convoluted that it takes a while to wrap your brain around it.