We need the following conversion factor:
1 mm = 10-3 m
1 cm = 10-2 m
1 in = 2.54 cm
1 ft = 12 in
The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.
How many quarters would have to be stacked to reach 575 ft, the height of the Washington Monument?
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