Bryan, Steve
In Engineering it is common to use 10*log10(x) for example if x=3
10*log10(3) = 4.77. This has the advantage that 10*log10(10) = 10. Many
times these are described as units of decibels (dB). For example 3
watts is 4.77 dBW (decibel watts). Or 10 milliwatts is 10 dBm. When
studying the laws of RF propagation or the strength of gravitational
force where in each case quantities are squared, dB = 10*log10(x^2) =
20*log10(x). So these precursor of multiplying by 10 or 20 becomes very
useful.
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