No... I am just assuming that the teacher forgot to give us the mass. I just wasn't sure if i was missing some kind of equation which would make that unnecessary. I understand that orbit is an elipse, and that what it orbits is one of the foci. is there any way to use that information without having the mass of what is being orbitted? The problem relates the central mass which it orbits (the earth), but gives us nothing about it. It's a test review question, so thats something that I wouldn't be able to look up during the actual test.
Also, usually in introductory physics classes, only circular orbits are considered. The term "orbital radius" implies circles, as ellipses don't have a radius. You don't have to worry about elliptical orbits, foci, or anything like that.