Answer:
2) 12,000 ft²
3) 30 gallons.
Explanation:
2) 1. You can calculate the lateral surface area of the exterior walls of the warehouse by applying the formula shown below:
![LA=h(2l+2w)](https://img.qammunity.org/2019/formulas/mathematics/college/tpf48jk916cvilieno32kol5yx2wxmr4x2.png)
Where h is the height, l is the lenght and w is the width.
2. Substitute values and you obtain that the lateral area is:
![LA=12,000ft^(2)](https://img.qammunity.org/2019/formulas/mathematics/college/f80302z3cw2x6qn7x2oiceu24i17ht6mg9.png)
3) You know that 1 gallon of paint covers 400 ft², therefore for 12,000 ft² are needed the following number of gallons (which is represented by x):