Answer:
The answer is option D.
Step-by-step explanation:

Hope this helps you
I believe the answer would be B
Answer:
C /2pi = r
Step-by-step explanation:
The circumference of a circle is given by
C = 2 * pi*r
We want to solve for r
Divide each side by 2 pi
C / 2pi = 2*pi*r / 2pi
C /2pi = r