Evaluating Formulas by Substitution Examples
Sara has a clock with a circular face. She wants to glue a ribbon around the outer edge of the face of the clock.
Heaven knows why she thinks this will look good. It would be enough to make Martha Stewart have a conniption fit. Ah, well. To each her own.
If the face of the clock has a radius of 5 inches, how much ribbon will Sara need to complete her aesthetic disaster?