Tritium is a radioactive isotope of hydrogen that decays by about 5% per year. a large bottle of water that contained 520,000 tritium atoms remained undisturbed for 8 years. how much tritium does the bottle contain now?

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?