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GraphCalc is an open-source computer program that runs in Microsoft Windows and Linux that provides the functionality of a graphing calculator.. GraphCalc includes many of the standard features of graphing calculators, but also includes some higher-end features:
Qalculate! supports common mathematical functions and operations, multiple bases, autocompletion, complex numbers, infinite numbers, arrays and matrices, variables, mathematical and physical constants, user-defined functions, symbolic derivation and integration, solving of equations involving unknowns, uncertainty propagation using interval arithmetic, plotting using Gnuplot, unit and currency ...
{{Age in years}} - returns a 2-year range; in 2022 someone born in 2000 may be either 21 or 22. Use {{ Age }} or {{ Years ago }} with a year parameter to return a single number of years {{ Age in years and days }}
In physical cosmology, the age of the universe is the time elapsed since the Big Bang.Astronomers have derived two different measurements of the age of the universe: [1] a measurement based on direct observations of an early state of the universe, which indicate an age of 13.787 ± 0.020 billion years as interpreted with the Lambda-CDM concordance model as of 2021; [2] and a measurement based ...
Visual representation of the Logarithmic timeline in the scale of the universe. This timeline shows the whole history of the universe, the Earth, and mankind in one table. . Each row is defined in years ago, that is, years before the present date, with the earliest times at the top of the ch
[20] [21] 1642 Blaise Pascal invented a mechanical calculator, [b] the first digital calculating machine. [22] 1647 René Descartes proposed that bodies of animals are nothing more than complex machines (but that mental phenomena are of a different "substance"). [23] 1654
Before Present (BP) or "years before present (YBP)" is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Because the "present" time changes, standard practice is to use 1 January 1950 as the commencement date ...
After three years of effort and 50 prototypes [21] he introduced his calculator to the public. He built twenty of these machines in the following ten years. [22] This machine could add and subtract two numbers directly and multiply and divide by repetition.