#### Answer

r$\approx$3.5 m

#### Work Step by Step

Use the Circumference formula C=2$\pi$r to solve for the radius represented by r. Since we are given that the circumference is 22, plug 22 in for C giving you:
22=2$\pi$r
Divide both sides by 2$\pi$; remember that $\pi$$\approx$3.14.
This leaves us with the answer r$\approx$3.5.