The first thing we must do is find the amount of land that will be used for the 120 lots.
We must remember that 10% of the land will not be used for the lots.
We have then:
[tex]100 - (0.10) * (100) = 100 - 10 = 90 acres.
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Then, we must consider the following conversion of units:
[tex]1 acre = 43560 ft ^ 2
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Applying the conversion we have:
[tex](90) * (43560) = 3920400 ft ^ 2
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Then, the amount of square feet for each lot is given by:
[tex]3920400/120 = 32670 ft ^ 2
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Answer:
There will be 32670 square feet in each lot.