Which is the image of triangle e after a reflection over the y-axis

Which of the following statement about pascal's triangle are true?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

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?