Respuesta :

Answer:

56.6

Step-by-step explanation:

2 (pi)(r)

2 (3.142) (9)

6.284 (9)

56.556

one decimal place = 56.6

Answer:

28.2

Step-by-step explanation:

C=2(3.142)(4.5)

Radius- half the width.

Hope this helped :)