Can someone me on this question and explain how you got the answers

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079