I need help PLEASE A group of students is arranging squares into layers to create a project. The first layer has 4 squares. The second layer has 8 squares. Which formula represents an arithmetic explicit formula to determine the number of squares in each layer?

a. f(1) = 4; f(n) = 4 ⋅ d(n − 1), n > 0
b. f(1) = 4; f(n) = 4 ⋅ d(n + 1), n > 0
c. f(1) = 4; f(n) = 4 + d(n + 1), n > 0
d. f(1) = 4; f(n) = 4 + d(n − 1), n > 0

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?

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?

How many verticies does a triangular prims have