Shelby purchases her college books for the upcoming semester. She has to pay $98 for a biology book, $38 for a used poetry book, and $74 for an Algebra I textbook. If the sales tax rate is 7.5%, how much tax will Shelby pay?

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.