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  2. Social Security (United States) - Wikipedia

    en.wikipedia.org/wiki/Social_Security_(United...

    The payroll tax rate totals 12.4 percent of earnings up to the taxable maximum (the rate is 6.2 percent from workers and 6.2 percent from employers and 12.4 percent from the self-employed). The OASI Trust Fund and the DI Trust Fund are legally separate.

  3. e (mathematical constant) - Wikipedia

    en.wikipedia.org/wiki/E_(mathematical_constant)

    If the interest is credited twice in the year, the interest rate for each 6 months will be 50%, so the initial $1 is multiplied by 1.5 twice, yielding $1.00 × 1.5 2 = $2.25 at the end of the year. Compounding quarterly yields $1.00 × 1.25 4 = $2.44140625, and compounding monthly yields $1.00 × (1 + 1/12) 12 = $2.613035....

  4. Gini coefficient - Wikipedia

    en.wikipedia.org/wiki/Gini_coefficient

    [3] [4] The Gini coefficient was proposed by Corrado Gini as a measure of inequality of income or wealth. [5] For OECD countries in the late 20th century, considering the effect of taxes and transfer payments, the income Gini coefficient ranged between 0.24 and 0.49, with Slovakia being the lowest and Mexico the highest. [6]

  5. History of mathematics - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematics

    [115] [116] Though more of a matter of computational stamina than theoretical insight, in the 5th century AD Zu Chongzhi computed the value of π to seven decimal places (between 3.1415926 and 3.1415927), which remained the most accurate value of π for almost the next 1000 years.

  6. Economy of the United States - Wikipedia

    en.wikipedia.org/wiki/Economy_of_the_United_States

    The United States has a highly developed mixed economy. [44] [45] [46] It is the world's largest economy by nominal GDP and second largest by purchasing power parity (PPP). [47]As of 2024, it has the world's sixth highest nominal GDP per capita and eighth highest GDP per capita by PPP). [10]

  7. Unemployment in the United States - Wikipedia

    en.wikipedia.org/wiki/Unemployment_in_the_United...

    The steady employment gains in recent months suggest a rough answer. The unemployment rate has been 7.9 percent, 7.8 percent and 7.8 percent for the past three months, while the labor force participation rate has been 63.8 percent, 63.6 percent and 63.6 percent. Meanwhile, job gains have averaged 151,000.

  8. Iraq - Wikipedia

    en.wikipedia.org/wiki/Iraq

    [195] [196] Christians numbered over 1.4 million in 1987 or 8% of the estimated population of 16.3 million and 550,000 in 1947 or 12% of the population of 4.6 millions. [197] After the 2003 invasion of Iraq , violence against Christians rose, with reports of abduction, torture, bombings, and killings.

  9. Income inequality in the United States - Wikipedia

    en.wikipedia.org/wiki/Income_inequality_in_the...

    From 2007 to 2010 total income going to the bottom 99 percent of Americans declined by 11.6%, while the top 1% fell by 36.3%. In 2014 Saez and Gabriel Zucman reported that more than half of those in the top 1 percent had not experienced relative gains in wealth between 1960 and 2012. In fact, those between the top 1% and top .5% had lost ...