1. The problem statement, all variables and given/known data If the intensity level at distance d of one trombone is 70 dB, what is the intensity level of 76 identical trombones, all at distance d? 2. Relevant equations β = (10 dB) log10(I/I0) I0= 1.0 x 10-12 W/m2 I = power/area 3. The attempt at a solution 70db = 10db log10(I/I0) 7db = log10(I/I0) 107 = 10log10(I/I0) 107 = (I/I0) I = 0.00001 W/m2 Then I multiplied that by 76 and put it back in the general equation to generate β = 98db, which is wrong. β = 89db.