Find the geometric mean between each pair of numbers. 28 and 7

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

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.

Which of those sequences is a geometric sequence