4. How far away would you be if a rock concert with a power of 1.45 kW and the sound intensity is 3.5 X10^-9 W/m^2?

Idon’t quite understand this problem

The two required components for a generator are

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line