Aladder is leaning up against a house at a 49∘ angle. jim, who is 5 feet tall, is standing upright on the ladder forming angle b. he is also holding a board which rests 2 feet below him on the ladder. according to the triangle in the figure and the given information, find the shortest length of the board needed. (round your final answer to the nearest tenth place.)

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?