Brooke paid $45 for a course on candle-making. she spent $106 for wax and supplies but later returned one $8 candle mold. write and find the vaule of an integer expression to show the change in the amount of money she has

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?