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munabjelily
munabjelily munabjelily
  • 18-06-2016
  • Mathematics
Answered

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.

Verified Answer :

Ckaranja
Ckaranja Ckaranja
  • 18-06-2016

I\(\alpha \frac{1}{s}\)
I=\(\frac{k}{s}\)
8000=\(\frac{k}{2}\)
k=16000
when s= 11 miles, then,
I=\(\frac{16000}{11}\)
I=1155 units

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