Answer:
C. 66 mm (using 3.14, it would be 65.94 mm)
Step-by-step explanation:
From what I know, the radius of this coin is 10.5 mm.
The formula for the circumference of a circle is 2πr or πd.
In this case we're using 3.14 for π.
(2 * 10.5) * 3.14
21 * 3.14
21 * 3.14 is the same as 62.8 + 3.14
62.8 + 3.14
65.94 mm
This is close to 66 mm, which was C, so that is the answer.
