How many sheets of paper are needed to make a stack as tall as the St. Louis Arch?

The Gateway Arch in St. Louis stands at 630 feet tall. A standard sheet of paper has a thickness of about 0.004 inches. To determine the number of sheets needed, you would convert the height of the Arch to inches (630 feet x 12 inches/foot = 7,560 inches) and then divide by the thickness of a sheet of paper (7,560 inches / 0.004 inches = 1,890,000 sheets). Therefore, approximately 1.89 million sheets of paper would be required to match the height of the Arch.