Final answer:
The average number of square feet per building lot is 21,690 square feet.
Step-by-step explanation:
To find the average number of square feet per building lot, we need to first find the total area of the land in square feet and then divide it by the number of building lots.
Given that 1 square mile = 640 acres and 1 acre = 43,560 square feet, we can convert 0.200 square miles to square feet:
0.200 square miles * 640 acres * 43,560 square feet = 5,547,840 square feet.
Next, we divide this total area by the number of building lots, which is 256:
5,547,840 square feet / 256 = 21,690 square feet.
Therefore, the average number of square feet per building lot is 21,690 square feet.
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