A bicycle trail in the shape of a circle has a diameter of 3 miles michelle biked around the trail 4 times about how far did michelle bike

12PI miles

Step-by-step explanation: Circumference of a circle is PI*diameter. In this case it is obligatory just to multiply by 4, because he encircles is 4 times. So the answer is: P=4*3*PI=12PI. If you need detailed answer you can multiply by p=3.14;