c. 12 9. What is the value of the constant of variation k? a. 48 b. 24 d.6 10. If 8 persons require 6 hours to finish the job, how long should it take for 24 a. Ihr b. 2 hours C. 3 hours d. 4 11. What is the base of - (-6)S? a. 6 b. -6 C. -6x5 d. 12. Which of the following expressions is NOT equivalent to the expressions 4 28 a. 28x5 d. 28 b. 29 C. xs *-8​