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} (2\pi r)/(2\pi)=(4.25)/(2\pi) \\ r=(17)/(8\pi) \end{gathered}`

The answer is B

4.25/2pi