You need to check the AP credit chart for the schools you want to transfer to in order to find out how many credit units you will get and what courses you will be exempt from in their transfer preparation requirements.
Here are general UC policies on AP credit:
http://admission.universityofcalifornia.edu/counselors/exam-credit/ap-credits/index.html
Here are general CSU policies on AP credit:
https://www2.calstate.edu/apply/transfer/pages/advanced-placement-ap.aspx
For specific campuses and majors, check articulation pages on http://www.assist.org and on college web sites to see what requirements you will be exempt from (usually first semester or quarter of calculus).
You would not get double credit for regular calculus and business calculus, but business major programs typically accept either, since regular calculus is generally a more difficult course.