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The scale model of a skyscraper being built is 4.2 feet tall. When it's finished the skyscraper will be 525 meters tall. What scale was used to make the model

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The scale is (obviously)
.. 4.2 ft : 525 m
which translates, perhaps not so obviously to
.. 4.2*0.3048 m : 525 m
.. 1.28016 : 525
.. 1 : 410.1049...
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.. 1 : 410
User James Hao
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