Please help 15 minutes

D Question 7 1 pts Home 2nd Post Office Roundabout -- East --> 1st Post Office When you calculated the time that the car spent in the roundabout in Section 3.1, you used the equation circum ference = 2Tr where r = the radius of the roundabout, 52.8 feet, and 7= pi (the ratio of the diameter and circumference of a circle, which is well understood because it has been extensively studied by mathematicians) The result of this calculation is: Exact because 27 is exact An approximation because r is an approximation