Plz me get the answer to these asap

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

What is not true about kl and mn? what is mn? (show your work)

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.