Common Logarithm/Examples/0.06573

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Example of Common Logarithm

The common logarithm of $0 \cdotp 06573$ is:

$\log_{10} 0 \cdotp 06573 = \overline 2 \cdotp 8178 = -1 \cdotp 182$


Proof

\(\ds 0 \cdotp 06573\) \(=\) \(\ds 6 \cdotp 573 \times 10^{-2}\) using scientific notation
\(\ds \leadsto \ \ \) \(\ds \log_{10} 0 \cdotp 06573\) \(=\) \(\ds \map {\log_{10} } {6 \cdotp 573 \times 10^{-2} }\)
\(\ds \) \(=\) \(\ds \log_{10} 6 \cdotp 573 + \log_{10} 10^{-2}\) Logarithm of Product
\(\ds \) \(=\) \(\ds 0 \cdotp 8178 + \paren {-2}\) Common Logarithm of $6 \cdotp 573$, Definition of Common Logarithm
\(\ds \) \(=\) \(\ds \overline 2 \cdotp 8178\) Notation for Negative Logarithm
\(\ds \) \(=\) \(\ds -1 \cdotp 182\)

$\blacksquare$


Sources