Challenge
a gold mine has two elevators, one for equipment and another for the miners. the equipment elevator descends 4 feet per second. the elevator for the miners descends 14 feet per second. one day, the equipment elevator begins to descend. after 23 seconds, the elevator for the miners begins to descend. what is the position of each elevator relative to the surface after another 15 seconds? at that time, which elevator is deeper?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.