Respuesta :

HomeworkHelper123456

Answer:

28.26

Step-by-step explanation:

Circumference= 2 pi x r

Diameter= 9 (double the radius)

Radius= 4.5

Pi= 3.14

2 x 3.14= 6.28

6.28 x 3.14= 28.26

:D

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28.6

look up the circumference formula, and then plug the numbers in

remember radius is diameter divided by 2