How Is Sound Intensity Calculated at a Distance?

[tasha_michelle]

sound wave of a source??

Homework Statement

A sound wave radiates from a source to all directions, if the power of the sound is 200 watts then the intensity of the sound wave 100m from the source is what?

Homework Equations

is this question complete / incomplet? is it missing any information that I need to solve the problem. what equation do i use?

The Attempt at a Solution

i tried B (200)log of 10 =(100m)log I/Io ?

 

[malawi_glenn]

Imagine a sphere of radius 100m, how big is its area? How is power related to intensity?