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  2. Certified Acceptance Corporation - Wikipedia

    en.wikipedia.org/wiki/Certified_Acceptance...

    The firm has since changed its name to CDN Exchange, [8] whose dealers are also able to make markets in non-CAC certified coins. CDN Exchange has over 180 member dealers posting more than 121,000 bids totaling nearly $1 billion. CAC has purchased over $425 million worth of CAC coins. [1] [2] [11] [18] [4] [8]

  3. Calculator input methods - Wikipedia

    en.wikipedia.org/wiki/Calculator_input_methods

    Calculator input methods. There are various ways in which calculators interpret keystrokes. These can be categorized into two main types: On an expression or formula calculator, one types in an expression and then presses a key, such as "=" or "Enter", to evaluate the expression. [4][5][6] There are various systems for typing in an expression ...

  4. 1 + 2 + 3 + 4 + ⋯ - ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...

  5. AOL Mail

    mail.aol.com

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

  6. Cognitive dimensions of notations - Wikipedia

    en.wikipedia.org/wiki/Cognitive_dimensions_of...

    Cognitive dimensions or cognitive dimensions of notations[1][2] are design principles for notations, user interfaces and programming languages, described by researcher Thomas R.G. Green [3] and further researched with Marian Petre. [1] The dimensions can be used to evaluate the usability of an existing information artifact, or as heuristics to ...

  7. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci sequence. In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . Many writers begin the sequence with 0 and 1, although some authors start it from 1 and 1 [1][2] and some (as ...

  8. Canadian dollar - Wikipedia

    en.wikipedia.org/wiki/Canadian_dollar

    The Canadian dollar (symbol: $; code: CAD; French: dollar canadien) is the currency of Canada. It is abbreviated with the dollar sign $. There is no standard disambiguating form, but the abbreviations Can$, CA$ and C$ are frequently used for distinction from other dollar-denominated currencies (though C$ remains ambiguous with the Nicaraguan córdoba).

  9. 3-4-6-12 tiling - Wikipedia

    en.wikipedia.org/wiki/3-4-6-12_tiling

    This 2-uniform tiling can be used as a circle packing.Cyan circles are in contact with 3 other circles (2 cyan, 1 pink), corresponding to the V4.6.12 planigon, and pink circles are in contact with 4 other circles (1 cyan, 2 pink), corresponding to the V3.4.6.4 planigon.