12. Determine whether each of these functions from Z to Z is one-to-one. a) fen) = n - 1 c) fen) = n3 b) fen) = n 2 + 1 d) fen) = rn/21 13. Which functions in Exercise 12 are onto?

You are a male who just graduated from college with a bachelor's degree. you have a job paying $50,780.00/yr. a. how does your salary compare to the yearly median earnings for a male with a bachelor's degree? b. what is the difference between the yearly median earnings for a male with a bachelor's degree compared to a male who does not attend college after earning a high school diploma?