Christine used 12 cubes to make this 3-step staircase. if she uses a total of 56 cubes to make a similar staircase, how many steps will the staircase have? think of using objects to you solve this problem.

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?