The answer will be 46,200 Hopes this helps. :)
Answer:

Step-by-step explanation:
The formula of an area of a rectangle:

<em>l</em><em> - length</em>
<em>w</em><em> - width</em>
We have

Substitute:

Use FOIL <em>(a + b)(c + d) = ac + ad + bc + bd</em>
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combine like terms

The answer would be C) because there are 11 possibilities of who can line up first, and after the first person, 10 possibilities, then 9, and so on. So you would need to multiply 11x10x9x8x...x1.
3+-4=-1
3-4=-1
-1=-1
so the answer is:
-1 = -1
12000 - 2900 = 9100
9100 / 36 = 252.77.....about 253 per month