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The harmonic mean

Calculator based on the entered numbers separated by commas calculate the harmonic mean.        

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Weighted average ratings

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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.      
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Calculate how long you go on foot

Calculator calculates the approximate time given distance and overcome the distance on foot.
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Calculator average revenue per employee in the company

Calculator on the basis of the specified amount paid salaries and number of employees, calculates the average annual and