List the steps for developing a model.

So me with this math problem. find the value of x the table shows the masses of 50 eggs. mass: 40-44 eggs: 6 mass: 45-49 eggs: x mass: 50-54 eggs: 12 mass: 55-59 eggs: 10 mass: 60-64 eggs: 7 mass: 65-69 eggs: 2 you!

Given the following statements, which is the best

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2