Serial numbers for a product are to be made using 3 letters followed by 3 numbers. if the letters are to be taken from the first 5 letters of the alphabet with no repeats and the numbers are taken from the digits
0 through 9 with repeats possible, how many serial numbers can be generated?

Ahiking trail is 6 miles long. it has 4 exercise stations, spaced evenly along the trail. what is the distance between each exercise station?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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?