Pls asap80 points and brainleist

the graph represents the money collected at the movie theater on saturday. find the domain when the maximum number of people allowed in the movie theater is 30 people.

graph of y equals 2 times x plus 40 with x axis labeled number of people and y axis labeled amount of money

0 ≤ y ≤ 30
40 ≤ x ≤ 100
0 ≤ x ≤ 30
40 ≤ y ≤ 100

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?