*** please someone CAN YOU HELP WITH THIS*** What does the term "matching parts" or "similar terms" mean? You can explain in words or with an example its math

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?

Find the root(s) of f (x) = (x- 6)2(x + 2)2.

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?