There are 4 different french books and 4 different spanish books. how many ways are there to arrange them on a shelf if

(a) books of the same language must be grouped together, french on the left, spanish on the right?

(b) french and spanish books must alternate in the grouping, beginning with a french book?

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.