Answer: Step 3
Step-by-step explanation: She was going fine until she divided wrong.
12= 4f Divide both sides by 4 to isolate f
12/4 = f
3 = f
4 * 3 =12
Circumference = 2πr or πd
The formula for circumference is 2πr (2 times pi times the radius)
2r = d (The radius x 2 = the diameter), so the circumference also = πd (pi times the diameter)
I believe that the answer is 6/-5.