Carter has to choose a combination for his locker. the combination must have 3 numbers from 1 to 13. the second number has to be a number from 0 to 8. find the total number of combinations carter could choose.

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.