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  2. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    The term algebra is derived from the Arabic word al-jabr meaning 'the reunion of broken parts' that he used for naming one of these methods in the title of his main treatise. [31] [32] Algebra became an area in its own right only with François Viète (1540–1603), who introduced the use of variables for representing unknown or unspecified ...

  3. JumpStart Adventures 4th Grade: Haunted Island - Wikipedia

    en.wikipedia.org/wiki/JumpStart_Adventures_4th...

    The protagonist is a fourth-grade student who missed the day of school when the class's new substitute teacher was a witch named Ms. Grunkle. After signing in at the schoolhouse, the protagonist is transported to Haunted Island off the Coast of West Africa. With the aid of a large purple bat named Flap and a fortune teller named Madame Pomreeda, the protagonist must rescue th

  4. Graphite - Wikipedia

    en.wikipedia.org/wiki/Graphite

    Graphite (/ ˈ ɡ r æ f aɪ t /) is a crystalline allotrope (form) of the element carbon.It consists of many stacked layers of graphene, typically in the excess of hundreds of layers.

  5. Accuracy and precision - Wikipedia

    en.wikipedia.org/wiki/Accuracy_and_precision

    Accuracy is also used as a statistical measure of how well a binary classification test correctly identifies or excludes a condition. That is, the accuracy is the proportion of correct predictions (both true positives and true negatives) among the total number of cases examined. [10]

  6. Kelvin - Wikipedia

    en.wikipedia.org/wiki/Kelvin

    The word "kelvin" is not capitalized when used as a unit. It may be in plural form as appropriate (for example, "it is 283 kelvins outside", as for "it is 50 degrees Fahrenheit" and "10 degrees Celsius").

  7. Hexane - Wikipedia

    en.wikipedia.org/wiki/Hexane

    Hexane (/ ˈ h ɛ k s eɪ n /) or n-hexane is an organic compound, a straight-chain alkane with six carbon atoms and the molecular formula C 6 H 14. [7]Hexane is a colorless liquid, odorless when pure, and with a boiling point of approximately 69 °C (156 °F).

  8. United States Army - Wikipedia

    en.wikipedia.org/wiki/United_States_Army

    pay grade Special grade [d] O-10 O-9 O-8 O-7 O-6 O-5 O-4 O-3 O-2 O-1 NATO code OF-10 OF-9 OF-8 OF-7 OF-6 OF-5 OF-4 OF-3 OF-2 OF-1 Insignia Army Green Service Uniform Army Blue Service Uniform Army Combat Uniform Title General of the Army: General: Lieutenant general: Major general: Brigadier general: Colonel: Lieutenant colonel: Major: Captain ...