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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

The calculator calculates the weighted average of the ratings of the following items.

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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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## Arabic numbers Converter - Roman

Calculator converts numbers to roman Arabic or Roman to Arabic vice versa. The maximum value that the calculator correctly parse the number 3999.

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## Multiplication table

Multiplication table 20 × 20 gives the opportunity to multiply their arbitrary natural numbers (1-20).

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## Inductance linear guide

The calculator calculates the inductance of the linear guide based on input of diameter and length.

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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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## Replenishing fluids - FFP (fresh frozen plasma)

Calculator based on the entered weight calculates the amount of fresh frozen plasma for transfusion in ml / hour due to the loss of fluids (sweating, bleeding, and other pathological processes).

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## Examine the variability of the quadratic function

Calculator examines the variability of the course of a quadratic function in the field of real numbers.