HELP PLEASE IMPORTANT 15. 5(4)
16. 3(-1)
17. (-5)(8)
18. -7(4)(8)
19.(-5)(4)(-1)
20.-5(-10)^3
21.-(-5)^2(4)
22. -4(8) - (-5)
23. (4)^2 - 4 (-5)(-1)

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?

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.