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Advanced Math/Number of Acres Follow-up

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Question
area = n ft
n ft (1 acre/43560 ft) = (n/43560) acres

I was unclear on this part of your solution.  Thanks again.

Answer
The tract of land is a square that is n feet on each side, so its area is n square feet.

An acre is a measure of area. 1 acre = 43,560 square feet.
Convert the area of the tract from square feet into acres.

n ft = n ft (1 acre/43560 ft) = (n/43560) acres

The ft units cancel out, leaving the answer in acres.

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