12. In a laboratory experiment, Amoeba A lives 5 hours longer than Amoeba B, and Amoeba B lives twice as long as Amoeba C. If n is the lifespan of Amoeba C in hours, what is the lifespan of Amoeba A, in terms of n?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

According to the meaning of the question, the lifespan of A is 2n+5.