Develop an experiment that will help you determine how long it will take your principal to say every students name in the seventh grade (first and last). Use math to justify the amount of time it will take. This will help you stimate how long your 8th grade promotion will take to complete.

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?