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Algebra
Pregunta

2) The intensity i of a television signal varies i...

2) The intensity i of a television signal varies inversely as the square of the distance d from the transmitter. The intensity of a television signal is \( 25 W / km ^ { 2 } \) at a distance of \( 2.25 km \) . A) How far from the transmitter are you when the intensity is \( 30 W / km ^ { 2 } \) ? B) What would be the intensity of the television signal if the distance from the transmitter is \( 5 km \) ? 

Answer

A) 

\(i= \frac{k}{d} \Rightarrow k= id= 56.25\\i= 30\Rightarrow d= \frac{56.25}{30} = 1.875\)

B)

\(d= 5\Rightarrow i= \frac{56.25}{5} = 11.25\)

Solución
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