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  2. Ten percent of the brain myth - Wikipedia

    en.wikipedia.org/wiki/Ten_percent_of_the_brain_myth

    The 10% of the brain myth states that humans generally use only one-tenth (or some other small fraction) of their brains. It has been misattributed to many famous scientists and historical figures, notably Albert Einstein. [1] By extrapolation, it is suggested that a person may 'harness' or 'unlock' this unused potential and increase their ...

  3. Middle gray - Wikipedia

    en.wikipedia.org/wiki/Middle_gray

    Middle gray. 50% CIELAB lightness. ( Y = 18.4%) In photography, painting, and other visual arts, middle gray or middle grey is a tone that is perceptually about halfway between black and white on a lightness scale; [1] in photography and printing, it is typically defined as 18% reflectance in visible light. [2] [3]

  4. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    Fineness. The fineness of a precious metal object (coin, bar, jewelry, etc.) represents the weight of fine metal therein, in proportion to the total weight which includes alloying base metals and any impurities. Alloy metals are added to increase hardness and durability of coins and jewelry, alter colors, decrease the cost per weight, or avoid ...

  5. Bayes' theorem - Wikipedia

    en.wikipedia.org/wiki/Bayes'_theorem

    Bayes' theorem is named after the Reverend Thomas Bayes ( / beɪz / ), also a statistician and philosopher. Bayes used conditional probability to provide an algorithm (his Proposition 9) that uses evidence to calculate limits on an unknown parameter. His work was published in 1763 as An Essay towards solving a Problem in the Doctrine of Chances.

  6. 27 Club - Wikipedia

    en.wikipedia.org/wiki/27_Club

    Three years earlier, Winehouse's personal assistant, Alex Haines, told the British press that Winehouse, then 25, feared she would join Jim Morrison, Brian Jones, and Kurt Cobain in dying at 27: "She reckoned she would join the 27 Club of rock stars who died at that age. She told me, 'I have a feeling I'm gonna die young'." Scientific studies

  7. St. Louis - Wikipedia

    en.wikipedia.org/wiki/St._Louis

    About 24% of the population was 19 or younger, 9% were 20 to 24, 31% were 25 to 44, 25% were 45 to 64, and 11% were 65 or older. The median age was about 34 years. The African-American population is concentrated in the north side of the city (the area north of Delmar Boulevard is 94.0% black, compared with 35.0% in the central corridor and 26.0 ...

  8. 401(k) withdrawal rules: What to know before cashing out ...

    www.aol.com/finance/what-are-401k-withdrawal...

    However, the SECURE 2.0 Act cut that in half to 25%. If you resolve the issue within two years, that percentage may drop down to 10%. What are the Roth 401(k) withdrawal rules?

  9. Coupon (finance) - Wikipedia

    en.wikipedia.org/wiki/Coupon_(finance)

    In finance, a coupon is the interest payment received by a bondholder from the date of issuance until the date of maturity of a bond . Coupons are normally described in terms of the "coupon rate", which is calculated by adding the sum of coupons paid per year and dividing it by the bond's face value. For example, if a bond has a face value of ...