Plz with 3 through 5 show ur work find the volume

The parabola opens: y=√x-4 (principal square root) up down right left

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.

If bradley saves for 4 weeks, what is the total amount of money he will have saved?