Plus, taking Calculus 2 will hardly be considered "having a background in math." The people who truly have backgrounds in math are those who studied astrophysics or engineering, won national math competitions, taught themselves calculus at the age of 14, etc. (for each of these things, I know someone applying to business school who has accomplished it).
As precision essay
said, focus on other aspects of your profile, making sure to demonstrate that your quantitative background is "good enough", i.e. good GMAT quant score, some reasonable quant coursework like stats, etc.
Also, you sound like you're still an undergrad. Why are you thinking about business school now? Have you ever worked in a corporate environment full time?
My blog: http://www.theapplicationist.blogspot.com/
My application status: 2012-profiles-w-admit-dings-results-no-discussion-116595.html#p983273