Haven't been able to find out how to reach the correct answer for this question. So, the first question is:

At a party, there is a louder stereo blaring some dank music. I'm a party animal so I'm standing 1 meter away from the stereo and I perceive a sound intensity of 10^-1

, what is the approximate decibel level that I perceive to the nearest tenth?

So I got 110 dB for this, from doing I(dB)=10log(I/I*). I'm not able to get a correct answer for part 2, which is:

You are more far away, 20 meters, because you are a normal person, what is the sound intensity you perceive and the approximate decibel level?

My answer for the sound intensity is 1/4000

and 83.979 dB for the decibel level. The answer key says it's 0.00025 dB and 10^-3

.

How would you get the correct answers for part 2?

2017-2018 Events: Chemistry Lab, Dynamic Planet, Microbe Mission, Experimental Design, Rocks and Minerals

2018-2019 Events: Dynamic Planet, Astronomy, Sounds of Music, Circuit Lab, Geologic Mapping