Respuesta :

ultrayellowblur1822

Answer:

A = 63.585 mm or round if needed

Step-by-step explanation:

Formula is A = pi radius squared

9 mm ÷ 2 mm = 4.5 mm

3.14 x 4.5 x 4.5= 63.585 mm

Hope this helped have a great day :)

It might be at least 63.585 I don't have all the info