+73 
1.) What is the intensity, I, of a sound with a decibel rating of 75?
+128460 Not totally sure about this , GM....check the answer
75 = 10 [ log I / I0 ] divide both sides by 10
75/10 [ log I / 10^(-12) ]
7.5 = [ log I ] /[ 10^(-12)] and we can write
7.5 = log I - log10^(-12) [ -log 10^(-12) = -( -12) log 10 = 12 * 1 = 12 ]
7.5 = log I - (-12)
7.5 = log I + 12
7.5 - 12 = log I
-5.5 = log I using the exponential form
10^(-5.5) w/m^2 = I
+73 Thanks, CPhill, I'm not totally sure about it either but its the best I have for now. Can you at least solve c.) and d.) here? https://web2.0calc.com/questions/on-the-axes-below-graph-y-3-x-confused
