For this case we have that by definition, the circumference of a circle is given by:

Where:
d: It is the diameter of the circle
They tell us that:

Substituting:

Thus, the circumference of the circle is 55 centimeters.
Answer:
Option B
Answer:
There must he a circulation. May not be causation.
It is B because for every point going down, there is 3 to the left and so it is 1/3 and it has to be negative because its going left