Wat is the perimeter of this tile 6in 2in

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Can someone answer this question? : )

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b