This is a pond in the shape of a prism. it is completely full of water. colin uses a pump to empty the pond. the level goes down by 20cm in the first 30 minutes. work out how many minutes colin has to wait for the pond to completely empty.

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?