NEED HELP ASAP!Find the missing length indicated

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?

Zack and tia played chess for 50 min they put the chessboard away at 11: 20 when did they start

Acheetah can run 70 per hour. what is the speed in feet per hour