What is the formula to find the circumference of a circle using the radius?

The formula to find the circumference of a circle using the radius is:

C = 2 π r

The variables are:

C = circumference

R = radius of circle

the first instruction in this question is "use the data ".

that right there is a pretty powerful hint that tells you that in order to answer
the question, you're going to need to use the data.  and not only that !   in order
to convince anybody else to answer the question, you're going to need to give
them the data before they can start on it. so, speaking philosophically, we would
be forced to say that the form in which you have posted the question here is
fundamentally flawed, and the question therefore can not be answered.  sorry.