Ummi is setting up an aquarium in the shape shown here. (Length = 3 ft, Width = 2 1/2 ft) She fills it partially with water. The volume of the water is 15 ft³. Then she adds more water to the aquarium. Now the volume of the water is 22 1/2 ft³? How much does the level of the water rise when Ummi adds more water? Show your work.

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?