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  2. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions.

  3. Basic reproduction number - Wikipedia

    en.wikipedia.org/wiki/Basic_reproduction_number

    In epidemiology, the basic reproduction number, or basic reproductive number (sometimes called basic reproduction ratio or basic reproductive rate ), denoted (pronounced R nought or R zero ), [1] of an infection is the expected number of cases directly generated by one case in a population where all individuals are susceptible to infection. [2]

  4. NuCalc - Wikipedia

    en.wikipedia.org/wiki/NuCalc

    pacifict .com. NuCalc, also known as Graphing Calculator, is a computer software tool made by Pacific Tech. It can graph inequalities and vector fields, and functions in two, three, or four dimensions. It supports several different coordinate systems, and can solve equations. It runs on OS X as Graphing Calculator, and on Windows .

  5. R (programming language) - Wikipedia

    en.wikipedia.org/wiki/R_(programming_language)

    R is a programming language for statistical computing and data visualization. It has been adopted in the fields of data mining, bioinformatics, and data analysis. [8] The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data. R software is open-source and free software.

  6. Microsoft Math Solver - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Math_Solver

    Microsoft Math Solver (formerly Microsoft Mathematics and Microsoft Math) is an entry-level educational app that solves math and science problems. Developed and maintained by Microsoft, it is primarily targeted at students as a learning tool. Until 2015, it ran on Microsoft Windows. Since then, it has been developed for the web platform and ...

  7. Windows Calculator - Wikipedia

    en.wikipedia.org/wiki/Windows_Calculator

    History. A simple arithmetic calculator was first included with Windows 1.0.. In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

  8. List of European countries by minimum wage - Wikipedia

    en.wikipedia.org/wiki/List_of_European_countries...

    The following list provides information relating to the minimum wages (gross) of countries in Europe.. The calculations are based on the assumption of a 40-hour working week and a 52-week year, with the exceptions of France (35 hours), Belgium (38 hours), United Kingdom (38 hours), Germany (38 hours), Ireland (39 hours) and Monaco (39 hours).

  9. Return on investment - Wikipedia

    en.wikipedia.org/wiki/Return_on_investment

    Return on investment ( ROI) or return on costs ( ROC) is the ratio between net income (over a period) and investment (costs resulting from an investment of some resources at a point in time). A high ROI means the investment's gains compare favourably to its cost. As a performance measure, ROI is used to evaluate the efficiency of an investment ...