Hello my friend. Yes, it is true that you will have a better shot if you DO take a calculus class online. However, it is not required. Afterall, if you take a GMAT or GRE and do VERY well on the quantitative section, it could be enough. Most top schools offer up the equivalent of “math camp” prior to school’s beginning. So it isn’t the end of the world, if you don’t get a chance to enroll. Hopefully tho, you WILL have some strong test scores. With low test scores AND no good quantitative experience at school, you may have a bit of a problem…