The layer of gold coating on a ring should be 0.03 millimeters thick when the ring is completed. a coating of 0.021 millimeters has already been applied. how many more millimeters of gold coating must be added to finish the ring? a. 0.018 millimeters b. 0.009 millimeters c. 0.18 millimeters d. 0.09 millimeters

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?