SOLUTION: Use two unit multipliers to convert 28,000 square feet to square miles. How do you do this?

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Question 228062: Use two unit multipliers to convert 28,000 square feet to square miles.
How do you do this?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Use two unit multipliers to convert 28,000 square feet to square miles.
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1 mile = 5280 ft
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The unit multiplier is (1 mile/5280 ft) because that fraction equals 1.
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Your Problem:
28000 ft^2(1 mile/5280 ft)(1 mile/5280 ft)
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= [28000*1*1]/[1*5280*5280] miles^2
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= [28000/27878400] miles^2
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= 0.00100436.. sq. miles
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Cheers,
Stan H.