Questions about dual majoring

<p>I am E.D. committed to Miami University for next year. I have no submitted my app yet because I wasn't sure if I want to dual major. My first choice major is business-economics but I'm also interested in mathematics. I know business economics requires a lot of math classes, so it would be very doable with the overlap. Do I pick up a dual major my second year, or do I have to notify them prior to entering my freshman year? </p>

<p>I'm thinking about calling up the admissions office or the business school office tomorrow to consult them about it, but if anyone had any feedback about this issue it would be very helpful.</p>