On their most recent 8-mile training run, Pepe averaged a speed of 12 1
2
of a mile in 4.5 minutes, while Paula averaged 34
3
4
of a mile in 7.5 minutes.

How many minutes did it take the faster runner to finish the 8 mile run?

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?