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2. Miles per hour - Wikipedia

   en.wikipedia.org/wiki/Miles_per_hour

   Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.

3. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   2. Denotes the range of values that a measured quantity may have; for example, 10 ± 2 denotes an unknown value that lies between 8 and 12. ∓ (minus-plus sign) Used paired with ±, denotes the opposite sign; that is, + if ± is –, and – if ± is +. ÷ (division sign)

4. List of mathematical constants - Wikipedia

   en.wikipedia.org/wiki/List_of_mathematical_constants

   A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

5. Metrication in the United States - Wikipedia

   en.wikipedia.org/wiki/Metrication_in_the_United...

   Railroads use the standard gauge of 4 feet 8 + 1 ⁄ 2 inches, as does most of Europe (where it is expressed instead as 1,435 mm). MPH and smaller km/h values on speedometer U.S. Federal Motor Vehicle Safety Standard 101, which governs vehicle controls and displays, permits speedometers to display miles per hour (MPH) or both MPH and km/h. [ 110 ]

6. Wikipedia:Rendering math - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Rendering_math

   Mixing of font families (sans-serif for English, serif for math), in running text, can be jarring. Reverts to the appearance of raw wiki code on systems that don't support font changes (e.g. the Wikipedia Android app) Not an exact match to <math> formulas in the same article uses Times font, not Computer Modern as in TeX; text generally look ...

7. List of formulas in elementary geometry - Wikipedia

   en.wikipedia.org/wiki/List_of_formulas_in...

   The basic quantities describing a sphere (meaning a 2-sphere, a 2-dimensional surface inside 3-dimensional space) will be denoted by the following variables r {\displaystyle r} is the radius, C = 2 π r {\displaystyle C=2\pi r} is the circumference (the length of any one of its great circles ),

8. List of letters used in mathematics, science, and engineering

   en.wikipedia.org/wiki/List_of_letters_used_in...

   Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

9. Mathematical notation - Wikipedia

   en.wikipedia.org/wiki/Mathematical_notation

   Mathematical notation is widely used in mathematics, science, and engineering for representing complex concepts and properties in a concise, unambiguous, and accurate way. For example, the physicist Albert Einstein 's formula E = m c 2 {\displaystyle E=mc^{2}} is the quantitative representation in mathematical notation of mass–energy ...