Customary distance
Question
An artist measures a mural border as 1.5 miles. How many feet long is the border?
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A792✗ Incorrect
Incorrect. This answer misplaces the decimal point (10 times too little).
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B7,920✓ Correct
Correct. Multiply by the conversion factor: 1.5 × 5,280 = 7,920.
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C15,840✗ Incorrect
Incorrect. This answer doubles the correct amount.
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D79,200✗ Incorrect
Incorrect. This answer misplaces the decimal point (10 times too much).
Rationale
A mile contains many feet. Multiply the length in miles by the feet in each mile.
Worked solution: Multiply by the conversion factor: 1.5 × 5,280 = 7,920.
RememberChoose the conversion direction by comparing the sizes of the units.
Sources
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Handbook 44 – 2024
National Institute of Standards and Technology · License: US government work (public domain) · Retrieved · Page 25
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