Help me out pleasee will give brainliest or whatever its called

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

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.