I need help understanding what happened to the 2 in the numerator of the highlighted part of the problem in the screen grab please. Why not say 3^k+6^k/2? Thank you.

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?