What should you do first when simplifying an expression that involved variables with know values?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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?

Change negative exponents to positive. then solve. round to four decimal places