Question

The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 11 miles? Round your answer to the nearest unit.

Answer 1

I
`\alpha (1)/(s)`
I=
`(k)/(s)`
8000=
`(k)/(2)`
k=16000
when s= 11 miles, then,
I=
`(16000)/(11)`
I=1155 units