Circular motion Involving Static Friction

[Jtappan]

Homework Statement

A coin is placed on a turntable that is rotating at 45.0 rpm. If the coefficient of static friction between the coin and the turntable is 0.1, how far from the center of the record can the coin be placed without having it slip off?
______ cm

Homework Equations

F = mew(s)N

The Attempt at a Solution

I have no idea how to solve this one...which information is implied? Any help?

 

[Anadyne]

The coin is moving in a circle right? Which means that there is some sort of centripetal force acting on the coin. What force is it?