Write an explicit formula for the sequence: 1/2, -1/4, 1/8, -1/6.
i know that the ratio is -0.5 but im confused on how to write this into a explicit formula.

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.