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  2. 0.999... - Wikipedia

    en.wikipedia.org/wiki/0.999...

    The Archimedean property: any point x before the finish line lies between two of the points P n (inclusive).. It is possible to prove the equation 0.999... = 1 using just the mathematical tools of comparison and addition of (finite) decimal numbers, without any reference to more advanced topics such as series and limits.

  3. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The first method, used in the chart below, is to count letter frequency in lemmas of a dictionary. The lemma is the word in its canonical form. The lemma is the word in its canonical form. The second method is to include all word variants when counting, such as "abstracts", "abstracted" and "abstracting" and not just the lemma of "abstract".

  4. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    A substantial fraction of the water supply for some regions consists of water extracted from water stored in stocks, and when withdrawals exceed recharge, stocks decrease. By some estimates, as much as 30 percent of total water used for irrigation comes from unsustainable withdrawals of groundwater, causing groundwater depletion .

  5. Economic history of the United States - Wikipedia

    en.wikipedia.org/wiki/Economic_history_of_the...

    The U.S. Constitution (Article 1, Section 8, Clause 5) gave the government the power to coin money to establish a mint. The dollar was established as the monetary unit of the U.S. by the Coinage Act of 1792, which also defined its value in terms of gold and silver. The First Bank of the United States was chartered in 1791. It was designed by ...