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Math

# 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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Math

## 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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Math

## Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Life

## Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.
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## Insulation of wall

Jak policzyć izolację ścian?
Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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Financial

## Net return on sales (ROS)

Calculator based on the values ​​entered and net profit calculated return on sales ROS. ROS announces net income (after tax), attributable to every penny of products, goods and services.
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Calendar

## Perpetual calendar

jak obliczyć dzień tygodnia na podstawie daty?
Calculator gives what day of the week for the date specified by the user.
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Medical

## Index calculator dialysis Kt / V

Calculator to the data calculates the dialysis KT / V __________ http://www.dialped.pl/archiwum/teksty/monit/monit9.html