How many acres are in a square mile?

Get ready for the Washington State Managing Broker Exam. Study with multiple choice questions and detailed explanations. Prepare confidently with updated resources!

A square mile consists of 640 acres because a mile is defined as 5,280 feet, and a square mile is calculated by multiplying the length by the width of a mile. Therefore, a square mile is:

1 mile x 1 mile = (5,280 feet) x (5,280 feet) = 27,878,400 square feet.

To convert this to acres, knowing that one acre equals 43,560 square feet, you divide the total square feet in a square mile by the number of square feet in an acre:

27,878,400 square feet ÷ 43,560 square feet/acre ≈ 640 acres.

This calculation confirms that a square mile is equal to 640 acres, which is why that answer is accurate. Other choices presented do not reflect the correct conversion, as they do not align with the established definitions and calculations of area measurements in terms of acres within a square mile.

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