$[-/15$ Points$]$

SERCP$1114\mathrm{.}5.$P$\mathrm{.}010.0/5$ Submissions Used

A person standing $1\mathrm{.}25$ m from a portable speaker hears its sound at an intensity of $6\mathrm{.}30{10}^{-3}\frac{W}{m^2}.$

$($a$)$ Find the corresponding decibel level.

dB

$($b$)$ Find the sound intensity $($in $\frac{W}{m^2})$ at a distance of $27\mathrm{.}0$ m $,$ assuming the sound propagates as a spherical wave.

$\frac{w}{m^2}$

$($c$)$ Find the decibel level at a distance of $27\mathrm{.}0$ m $.$

dB

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