Question

Find the exact circumference, in terms of , of a circle with the given radius.

3¼ inches

Answer 1

2* pi * radius

Answer 2

It would be 20.4 correct?

Answer 3

To be exact, you must say something like
\( 2*3.25*\pi= 6.5 \pi \)
As you know, pi is a number with unending decimals: 3.14159.... with no pattern
if you round pi to 3.14 you will not get an "exact" answer, just a close one.