I could never imagine taking a course on Entrepreneurship. It's something you learn by doing. At least it is for me. There's also so many good books out there...
Being good at math is like a superpower (at least it seems that way to a creative/language minded guy like me). Math requires schooling more than entrepreneurship.
Go with the math, and while you're getting really good at it, you'll come up with an awesome business idea that will help guys like me learn math faster.
Go with the math.