Algebra 2 help? 5. A construction explosion has an intensity I of 1.25 x 10–4 W/m2. Find the loudness of the sound in decibels if W/m2. Round to the nearest tenth. (1 point)81 decibels161 decibels82.2 decibels12.5 decibelsThe example question in the textbook is totally different so I'm not sure how to do this. I tried to make the equation and then got confused. An explanation would be great! Thanks
Accepted Solution
A:
The answer is 81 decibels To solve this, we will use the formula : dB = 10 x log (Isig/Iref)
terms will be:dB= decibels, Isig = signal's intensity Iref= softest sound's intensity which is 10^-12.
So the solutions is,dB = 10 x log (1.25 x 10–4 / 10^-12 ) = 80.97 decibels =81 decibels