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Mathematics 7 Online
OpenStudy (anonymous):

Intensity, I, of light received at a source varies inversely as the squre of the distance, d, from the source. If the light intensity is 41 ft-candles at 18ft, find the intensity at 9ft. I=k/d^2

OpenStudy (anonymous):

solve for k by plugging in your known values at 18ft, then plug 9 into the equation and get your I value

OpenStudy (anonymous):

I get I=164 at 9ft

OpenStudy (anonymous):

k=13284

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