it doesn't, at least not directly.
(note: math is used in the medical feild...trig and some calculus can apply)
basically, before going to medical school i need to get a degree in _something_. it does not matter what, so what i am doing is gaining as much college credit as i can during highschool so i don't have to spend as much money while i'm in undergraduate school, so i can get to medical school faster
once i graduate (assuming everything goes as planned) i should have half my degree. this is one reason why i don't understand why people can have such a hard time getting into/ getting through college. by taking many AP cources and CHS courses, i am gaining college credit by only paying $74 per AP test and ~$100 per CHS class. If i take enough of these, i can eliminate one or two YEARS of college, which can make college easily affordable (note: medical school will such, but at least college will be cheap(er)). Also, AP courses are available NATIONWIDE, and there is even a similar international program. i'm not sure about the widespreed availability of CHS courses, so, eh.
the point is...to get a 4-year degree in something, nothing is requiring you to pay for 4 years of tuition. there are other, cheaper means of aquireing the number of credits required.