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What are compound errors in measurement? Why didn't the earth end in 2012 ? What is area of the circular park 12? Find the power of 5 that occurs in the factorization of 10! = 10 · 9 · 8 · · · 2 · 1.
What about 100! = 100 · 99 · 98 · · · 2 ·1? Use the fact that every nonempty interval of real numbers?