# algebra

The light intensity of a light bulb varies inversely as the square of the distance from the light bulb. The function I(d) =   k/d^2 models this situation, where I is the light intensity, d is the distance from a light source, and k is a constant. If the light intensity 6 feet away from a light bulb is 20 lumens, what is the light intensity 10 feet away from the same light bulb?

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1. I=k/d^2
20=k/6^2
k=20*36

I=(20*36)/10^2

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bobpursley
2. Bobo ka sa math

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