document.write( "Question 306279: The intensity of light received from a source varies inversely as the square of the distance from the source. If the light intensity is 3 foot-candles at 16 feet, find the light intensity at 11 feet.
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Algebra.Com's Answer #219231 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"I=k%2FR%5E2\"$
\n" ); document.write( " $\"I1%2AR1%5E2=I2%2AR2%5E2=k\"$
\n" ); document.write( " $\"3%2A16%5E2=I2%2A11%5E2\"$
\n" ); document.write( " $\"I2=3%2A%28256%2F121%29\"$
\n" ); document.write( " $\"I2=6.35\"$
\n" ); document.write( "Approximately 6.35 footcandles \n" ); document.write( "

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