Answer:
28.26
Step-by-step explanation:
9x3.14=28.26
First divide the diameter by 2, to get the radius.
9 ÷ 2 = 4.5
2 x 3.14 = 6.28
6.28 x 4.5 = 28.26
Therefore, 28.26 is the correct answer
-kiniwih426
