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A question about pi (3.1415926535...). Read below.

If you calculated the circumference of a circle the size of the known universe, requiring that the answer be accurate to within the radius of one proton, how many decimal places of pi would you need to use? The choices are: A. 2 million B. 39 C. 6 billion D. 48,000.

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If you calculated the circumference of a circle the size of the known universe, requiring that the answer be accurate to within the radius of one proton, you would only need to use 39 decimal places. You can get more information at the trans4mind.com website.

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