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# Roots of a quadratic equation

Calculator based on the entered coefficients calculated roots of a quadratic equation.

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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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## Calculator floor panels

Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.
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## Virtual Calculator air temperature

Calculator based on the given air temperature, dew point and barometric pressure are calculated virtual temperature. This is the temperature damages that powinnoby have dry air to its density at the same pressure is equal to the density of moist air.
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## The distance calculator between cities Polish

Calculator helps you calculate the distance in a straight line between two selected major Polish cities.
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## Is the phrase is a palindrome

Calculator checks to see if the specified expression is a palindrome. Palindrome - sounding words as read from left to right and from right to left.
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## Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description