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  2. Toll-free telephone numbers in the North American Numbering ...

    en.wikipedia.org/wiki/Toll-free_telephone...

    Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes. Calls to the toll-free numbers are charged to the receiving party, and are free to the caller if dialed from land-line telephones, but may incur ...

  3. Medical test - Wikipedia

    en.wikipedia.org/wiki/Medical_test

    A medical test is a medical procedure performed to detect, diagnose, or monitor diseases, disease processes, susceptibility, or to determine a course of treatment. Medical tests such as, physical and visual exams, diagnostic imaging, genetic testing, chemical and cellular analysis, relating to clinical chemistry and molecular diagnostics, are typically performed in a medical setting.

  4. TI-89 series - Wikipedia

    en.wikipedia.org/wiki/TI-89_series

    The calculator can evaluate and simplify algebraic expressions symbolically. For example, entering x^2-4x+4 returns +. The answer is "prettyprinted" by default; that is, displayed as it would be written by hand (e.g. the aforementioned + rather than x^2-4x+4). The TI-89's abilities include:

  5. 900 (number) - Wikipedia

    en.wikipedia.org/wiki/900_(number)

    900 (nine hundred) is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10, it is a Harshad number. It is also the first number to be the square of a sphenic number.

  6. Intel X79 - Wikipedia

    en.wikipedia.org/wiki/Intel_X79

    The Intel X79 (codenamed Patsburg) is a Platform Controller Hub (PCH) designed and manufactured by Intel for their LGA 2011 (Socket R) and LGA 2011-1 (Socket R2).. Socket and chipset support CPUs targeted at the high-end desktop (HEDT) and enthusiast segments of the Intel product lineup: Core i7-branded and Xeon-branded processors from the Sandy Bridge and Ivy Bridge CPU architectures.

  7. Likelihood function - Wikipedia

    en.wikipedia.org/wiki/Likelihood_function

    The use of the probability density in specifying the likelihood function above is justified as follows. Given an observation x j {\textstyle x_{j}} , the likelihood for the interval [ x j , x j + h ] {\textstyle [x_{j},x_{j}+h]} , where h > 0 {\textstyle h>0} is a constant, is given by L ( θ ∣ x ∈ [ x j , x j + h ] ) {\textstyle {\mathcal ...

  8. Fundamental theorem of calculus - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorem_of...

    The area A(x) may not be easily computable, but it is assumed to be well defined. The area under the curve between x and x + h could be computed by finding the area between 0 and x + h, then subtracting the area between 0 and x. In other words, the area of this "strip" would be A(x + h) − A(x). There is another way to estimate the area of ...

  9. H-class battleship proposals - Wikipedia

    en.wikipedia.org/wiki/H-class_battleship_proposals

    The H class was a series of battleship designs for Nazi Germany's Kriegsmarine, which were intended to fulfill the requirements of Plan Z in the late 1930s and early 1940s. . The first variation, "H-39", called for six ships to be built, essentially as enlarged Bismarck-class battleships with 40.6 cm (16 in) guns and diesel propulsi