February 23, 2017

Homework Help: Calculus

Posted by Stuck on Sunday, June 20, 2010 at 10:35pm.

"The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. Two streetlights are 40m apart and one is twice as strong as the other. Where is the darkest spot between the two lights?"

I can draw the diagram, and can organize all the information, but can't seem to bring it all together into an equation I can work with.

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