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  2. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set. Explanations of the symbols in the right hand column can be found by clicking on them.

  3. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...

  4. Proxima Centauri - Wikipedia

    en.wikipedia.org/wiki/Proxima_Centauri

    About 88% of the surface of Proxima Centauri may be active, a percentage that is much higher than that of the Sun even at the peak of the solar cycle. Even during quiescent periods with few or no flares, this activity increases the corona temperature of Proxima Centauri to 3.5 million K, compared to the 2 million K of the Sun's corona, [ 38 ...

  5. Rate of return - Wikipedia

    en.wikipedia.org/wiki/Rate_of_return

    The annualized return (annual percentage yield, compound interest) is higher than for simple interest because the interest is reinvested as capital and then itself earns interest. The yield or annualized return on the above investment is 4.06 % = ( 1.01 ) 4 − 1 {\displaystyle 4.06\%=(1.01)^{4}-1} .

  6. U.S. prime rate - Wikipedia

    en.wikipedia.org/wiki/U.S._Prime_Rate

    Traditionally, the rate is set to approximately 300 basis points (or 3 percentage points) over the federal funds rate. The Federal Open Market Committee (FOMC) meets eight times per year wherein they set a target for the federal funds rate. In the United States, the prime rate is traditionally established by the Wall Street Journal. [2]

  7. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.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.

  8. Household income in the United States - Wikipedia

    en.wikipedia.org/wiki/Household_income_in_the...

    Median U.S. household income per County in 2021 Median U.S. household income through 2019 U.S. real median household income reached $63,688 in January 2019, an increase of $171 or 0.3% over one month over that of December 2018. This article is part of a series on Income in the United States of America Topics Household Personal Affluence Social class Income inequality gender pay gap racial pay ...

  9. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    A percentage over 80 is considered excellent; between 60 and 80 is considered to be 'first division'; between 40 and 60 is considered to be 'second division'. The Percentage System works as follows: the maximum number of marks possible is 100, the minimum is 0, and the minimum number of marks required to pass is 35.