Question 1208725
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A somewhat informal solution....  I will leave it to other tutors to provide a more formal solution if they want to.<br>
The ratio of distances is 1:2,
so the square of the ratio of distance is 1:4,
so, because it is an inverse variation, the ratio of sound levels is 4:1<br>
(28)*4 = 112<br>
ANSWER: 112 db<br>