Question

(Circumference or circles)
explain your answer so I can understand

Answer 1

5.5 inches

Explanation:

Answer 2

28.26

Explanation:

C=2
`\pi r\\` Radius is twice the diameter so put 2
`\pi r\\`

C=2*3.14*4.5

C=6.28*4.5

C=28.26