A company requires a password to access a data storage vault. The password must be 4 characters long and may contain digits and lowercase letters only. How many passwords are possible if characters can be repeated? Enter your answer as a number, such as: 425

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?