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In September 1981, the Atari Calculator was marketed in the Atari Connection magazine, in the section for new business and professional applications: [8]. More than a simple handheld calculator, the ATARI Calculator combines features found in scientific, business, and statistical calculators.
56 by 138 by 9 millimetres (2.20 in × 5.43 in × 0.35 in) The Sinclair Executive was the world's first "slimline" pocket calculator, and the first to be produced by Clive Sinclair 's company Sinclair Radionics. Introduced in 1972, the calculator was produced in at least two versions with different keyboard markings; a variant called the ...
When the New York City Transit Authority was created in July 1953, the fare was raised to 15 cents (equivalent to $1.71 in 2023) and a token was issued. [102] In 1970 the fare was raised to 30 cents. [103] This token is 23mm in diameter with a Y cut out, and is known as the "Large Y Cutout".
The Sinclair Sovereign was a high-end calculator introduced by Clive Sinclair 's company Sinclair Radionics in 1976. It was an attempt to escape from the unprofitable low end of the market, and one of the last calculators Sinclair produced. Made with a case of pressed steel that a variety of finishes, it cost between £30 and £60 at a time ...
Power of two. A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent. Powers of two with non-negative exponents are integers: 20 = 1, 21 = 2, and 2n is two multiplied by itself n times. [1][2] The first ten powers of 2 for non-negative ...
Desmos was founded by Eli Luberoff, a math and physics double major from Yale University, [3] and was launched as a startup at TechCrunch 's Disrupt New York conference in 2011. [4] As of September 2012, it had received around 1 million US dollars of funding from Kapor Capital, Learn Capital, Kindler Capital, Elm Street Ventures and Google ...
Scott Flansburg (born December 28, 1963) is an American dubbed "The Human Calculator" and listed in the Guinness Book of World Records for speed of mental calculation. He is the annual host and ambassador for The National Counting Bee, a math educator, and media personality. He has published the books Math Magic and Math Magic for Your Kids.
Viète's formula. In mathematics, Viète's formula is the following infinite product of nested radicals representing twice the reciprocal of the mathematical constant π: It can also be represented as. The formula is named after François Viète, who published it in 1593. [1] As the first formula of European mathematics to represent an infinite ...