For a light that has an intensity of 60 candles at its source, the intensity in candles, S, of the light at a point d d feet from the source is given by the formula S=60k/d^2 60, where k is a constant. If the intensity of the light is 40 candles at a distance of 6 feet from the source, what is the intensity of the light at a distance of 30 feet from the source?
Choose the correct choice from the following: A) 3/10 candles B) 1/2 candles C) 8/5 candles D) 2 candles E) 3 candles
ANS = 3/10   S= 60k/d^2   At 6 feet   40 = 60k/36 so k = 24   At 30 feet   S = 60 *24/30^2 = 8/5   8/5 candles
<result>C</result>
For a light that has an intensity of 60 candles at its source, the intensity in candles, S, of the light at a point d d feet from the source is given by the formula S=60k/d^2 60, where k is a constant. If the intensity of the light is 40 candles at a distance of 6 feet from the source, what is the intensity of the light at a distance of 30 feet from the source?