The power of sound from a speaker is raised from \( 10 \mathrm{~mW} \) to \( 500 \mathrm{~mW} \)...

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The power of sound from a speaker is raised from \( 10 \mathrm{~mW} \) to \( 500 \mathrm{~mW} \). What is the power in creased in (decibel) \( \mathrm{dB} \) as compared to initial original power is
\( P \)
(A) \( 1.6 \mathrm{~dB} \)
(B) \( 50 \mathrm{~dB} \)
(C) \( 16.9 \mathrm{~dB} \)
(D) \( 6.9 \mathrm{~dB} \)
W
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