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Keystone field

The calculator calculates the trapezoid box.          


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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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Rainwater tank

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Limit calculator, which entitles them to exemption from VAT in Poland

Calculator allows you to see what gives you the right amount of turnover for exemption from VAT if you started a business during the year.
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ROCE - an indicator of the efficiency of investment

The calculator calculates ROCE on the basis of these pre-tax profits, total capital and current liabilities ROCE (called Return On Capital Employed) - an indicator of the efficiency and profitability of the investment, which is the capital of the company involved.            
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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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How far was struck by lightning

Calculator based on the specified time from seeing lightning until you hear thunder in the distance calculated discharge occurred.