And fast. a tire on a miniature car has a diameter of 1.468 inches. the circumference of a tire for a full size car is 65.97 inches. 1) to the nearest tenth, what is the circumference of the miniature tire? (c = πd) a) 3.9 inches b) 4.6 inches c) 5.1 inches d) 6.3 inches 2) to the nearest tenth, how many times greater is the circumference of the full size car's tire when compared to the circumference of the miniature car's tire? a) 8.5 times greater b) 12.2 times greater c) 14.3 times greater d) 15.2 times greater