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  2. Repeating decimal - Wikipedia

    en.wikipedia.org/wiki/Repeating_decimal

    The repeating sequence of digits is called "repetend" which has a certain length greater than 0, also called "period". [5] In base 10, a fraction has a repeating decimal if and only if in lowest terms, its denominator has any prime factors besides 2 or 5, or in other words, cannot be expressed as 2 m 5 n, where m and n are non-negative integers.

  3. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    For B = 10% one requires n = 100, for B = 5% one needs n = 400, for B = 3% the requirement approximates to n = 1000, while for B = 1% a sample size of n = 10000 is required. These numbers are quoted often in news reports of opinion polls and other sample surveys. However, the results reported may not be the exact value as numbers are preferably ...

  4. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    The STC is useful for evaluating annoyance due to speech sounds, but not music or machinery noise as these sources contain more low frequency energy than speech. [ 1 ] There are many ways to improve the sound transmission class of a partition, though the two most basic principles are adding mass and increasing the overall thickness.

  5. Solar irradiance - Wikipedia

    en.wikipedia.org/wiki/Solar_irradiance

    In particular, a secular trend greater than 2 Wm −2 is considered highly unlikely. [27] [28] [29] Ultraviolet irradiance (EUV) varies by approximately 1.5 percent from solar maxima to minima, for 200 to 300 nm wavelengths. [30] However, a proxy study estimated that UV has increased by 3.0% since the Maunder Minimum. [31]

  6. Eris (dwarf planet) - Wikipedia

    en.wikipedia.org/wiki/Eris_(dwarf_planet)

    The mass of Eris can be calculated with much greater precision. Based on the accepted value for Dysnomia's period at the time—15.774 days [ 23 ] [ 68 ] —Eris is 27% more massive than Pluto. Using the 2011 occultation results, Eris has a density of 2.52 ± 0.07 g/cm 3 , [ g ] substantially denser than Pluto, and thus must be composed largely ...

  7. List of countries by English-speaking population - Wikipedia

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

    The European Union is a supranational union composed of 27 member states. The total English-speaking population of the European Union and the United Kingdom combined (2012) is 256,876,220 [69] (out of a total population of 500,000,000, [70] i.e. 51%) including 65,478,252 native speakers and 191,397,968 non-native speakers, and would be ranked 2nd if it were included.

  8. Englewood, New Jersey - Wikipedia

    en.wikipedia.org/wiki/Englewood,_New_Jersey

    Englewood Township, the city's predecessor, is believed to have been named in 1859 for the Engle family. The community had been called the "English Neighborhood", as the first primarily English-speaking settlement on the New Jersey side of the Hudson River after New Netherland was annexed by England in 1664, though other sources mention the Engle family and the heavily forested areas of the ...

  9. List of Asian countries by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_Asian_countries_by...

    10.8: 11.2: 10.6-0.6: 0.6: Life expectancy and HALE in countries of Asia in 2019 [5] Elaboration by sex [5] Interactive chart of male and female life expectancy in ...