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  2. List of countries by infant and under-five mortality rates

    en.wikipedia.org/wiki/List_of_countries_by...

    Under-five mortality rate per 1,000 live births (OECD-World Bank, 2020) LOCATION 2020 rate Australia 3.7 Austria 3.6 Belgium 4.2 Canada 5.0 Chile 6.8 Colombia 13.2 ...

  3. List of countries by mortality rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Country / territory Rate [1] Lithuania 15.16 Serbia 15.12 Romania 14.92 Latvia 14.69 Bulgaria 14.31 Ukraine 13.70 Russia 13.27 Estonia 13.13 Croatia 12.98 Hungary

  4. List of countries by past fertility rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_past...

    The fertility rate equals the expected number of children born per woman in her child-bearing years. ... 6.20 6.20 6.30 6.40 6.52 6.50 6.24 5.96 5.68 5.41

  5. Calculus - Wikipedia

    en.wikipedia.org/wiki/Calculus

    For example, traveling a steady 50 mph for 3 hours results in a total distance of 150 miles. Plotting the velocity as a function of time yields a rectangle with a height equal to the velocity and a width equal to the time elapsed. Therefore, the product of velocity and time also calculates the rectangular area under the (constant) velocity curve.

  6. 2020 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2020_United_States...

    On June 20, 2020, Trump's campaign held an in-person rally in Tulsa, Oklahoma, after the Oklahoma Supreme Court ruled that the event could go ahead despite continuing concerns over COVID-19. [116] Attendance at the rally was far lower than expected, being described as a "flop", and it led to a significant worsening of relations between Trump ...

  7. List of African countries by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_African_countries...

    Estimation of the World Bank Group for 2022. [2] [3] [4] The data is filtered according to the list of countries in Africa.The values in the World Bank Group tables are rounded.

  8. Economy of the United States - Wikipedia

    en.wikipedia.org/wiki/Economy_of_the_United_States

    The U.S. public debt was $909 billion in 1980, an amount equal to 33% of America's gross domestic product (GDP); by 1990, that number had more than tripled to $3.2 trillion – 56% of GDP. [374] In 2001 the national debt was $5.7 trillion; however, the debt-to-GDP ratio remained at 1990 levels. [ 375 ]

  9. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ / ⓘ; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter.It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of a curve.