3) A hippie in Oregon sees a lovely tree directly across the Columbia River in Washington that he wants to hug. The river current at that location is 5mph, and the width of the river is a quarter mile. If his boat can travel at 8 miles per hour, at what angle upstream must he point the boat in order to arrive at the opposite bank? How long will it take him to
cross the river?

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.