You can find the dimensions of the model and plug them into the formula for volume (length x width x height)
3x - 12
3(3x/3 - 12/3)
3(x - 4)
The answer is: 3(x - 4).
The answer is 2. This is because 2 = 4% of 50.
You can think of it like this:
4 is 4% of 100.
50 is half of 100.
Therefore, 4% of 50 is HALF of 4% of 100.
4 divided by 2 = 2
200,000 + 80,000 + 3,000 + 900 + 80