Question

The circumference of a circular frame is 4.25 inches. Which of the following expressions best represents r, the radius of the circular frame?

Answer 1

The rule of the circumference of a circle is

$C=2\pi r$

Since C = 4.25 inches

$2\pi r=4.25$

Divide both sides by 2 pi

$\begin{gathered} \frac{2\pi r}{2\pi}=\frac{4.25}{2\pi} \\ r=\frac{17}{8\pi} \end{gathered}$

The answer is B

4.25/2pi