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  2. Logarithm - Wikipedia

    en.wikipedia.org/wiki/Logarithm

    The prime number theorem asserts that π (x) is approximately given by ⁡ (), in the sense that the ratio of π (x) and that fraction approaches 1 when x tends to infinity. [90] As a consequence, the probability that a randomly chosen number between 1 and x is prime is inversely proportional to the number of decimal digits of x .

  3. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    DVD producers can also choose to show even wider ratios such as 1.66:1, 1.75:1, 1.77:1 and 1.78:1 [1] within the 16:9 DVD frame by hard matting or adding black bars within the image itself. The 16:9 aspect ratio was used often in British TVs in the United Kingdom in the 1990s, and is also used in smartphones, laptops, and desktops.

  4. Bell Labs - Wikipedia

    en.wikipedia.org/wiki/Bell_Labs

    The Old Bell Labs Holmdel Complex, located about 20 miles south of New York City, in New Jersey. Bell's Holmdel research and development lab, a 1,900,000-square-foot (180,000 m 2) structure set on 473 acres (191 ha), was closed in 2007. The mirrored-glass building was designed by Eero Saarinen. In August 2013, Somerset Development bought the ...

  5. Carl Friedrich Gauss - Wikipedia

    en.wikipedia.org/wiki/Carl_Friedrich_Gauss

    This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. German mathematician, astronomer, geodesist, and physicist (1777–1855) "Gauss" redirects here. For other uses, see Gauss (disambiguation). Carl Friedrich Gauss Portrait by Christian Albrecht Jensen, 1840 (copy from Gottlieb Biermann, 1887) Born Johann Carl Friedrich Gauss (1777-04-30 ...

  6. Turn (angle) - Wikipedia

    en.wikipedia.org/wiki/Turn_(angle)

    The number 2 π (approximately 6.28) is the ratio of a circle's circumference to its radius, and the number of radians in one turn. The meaning of the symbol π {\displaystyle \pi } was not originally fixed to the ratio of the circumference and the diameter.

  7. Biostatistics - Wikipedia

    en.wikipedia.org/wiki/Biostatistics

    Figure A: Line graph example. The birth rate in Brazil (2010–2016); [9] Figure B: Bar chart example. The birth rate in Brazil for the December months from 2010 to 2016; Figure C: Example of Box Plot: number of glycines in the proteome of eight different organisms (A-H); Figure D: Example of a scatter plot.

  8. Iron - Wikipedia

    en.wikipedia.org/wiki/Iron

    About 1 in 20 meteorites consist of the unique iron-nickel minerals taenite (35–80% iron) and kamacite (90–95% iron). [37] Native iron is also rarely found in basalts that have formed from magmas that have come into contact with carbon-rich sedimentary rocks, which have reduced the oxygen fugacity sufficiently for iron to crystallize.