I hope this helps you
circumference= pi.r^2
circumference = 3,14.13^2
circumference = 3,14.169
circumference = 530,66
Answer: 43,2
Step-by-step explanation:

Answer:
D for the first one and the second one
Step-by-step explanation:
i learned this trust me
Answer:
7x
Step-by-step explanation:
I believe that the answer to that one would be A.