4) The function f(t) - -0.1412.0.5t +30.2 models the U. S. population in millions, ages 65 and older wheret
represents years after 1990. The function g(t) = 0.53t2 11.96 + 107.1 models the total yearly cost of Medicare in
billions of dollars, where t represents years after 1990. What does the function represent? Find (10).

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.