I would suggest calling Student Care. It is understandable that you want to make sure you take a math course that PF will accept. Here is a website that has online courses. Penn Foster is listed here but that does not mean PF will accept their course. It is just a list of where students want to try to transfer in courses they are taking. I know NOTHING(in other words disclaimer on how good or bad they are) about the school. I came across them when I was looking for something.
http://www.straighterline.com/how-it-works/credit-transfer/
2016 Student Ambassador
PS you can call them at 1-888-427-1000 or email them through the help center tab.