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Whether a number is prime

Checks the user number is a prime number.


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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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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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Basic equations and inequalities with absolute value

Calculator applies to the basic issues of the absolute value of the non-zero parameter "a"
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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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Radioactive decay

The calculator calculates how much radioactive material remains after a certain period of time.      
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Maximum Heart Rate

The calculator allows you to calculate the index of maximum heart rate (MHR) for your body