HELP ASAP my answer is c

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.