The intensity $$ I $$ of a light source varies jointly with ...

Question Analysis
This problem assesses the understanding of joint variation and its application to real-world scenarios, specifically the inverse square law for light intensity.

Key Concept Explanation
The intensity of a light source varies jointly with the power and the inverse of the square of the distance . This can be expressed as , where is the constant of variation.

Step-by-step Solution
1. Write the joint variation equation:
2. Substitute the given values:

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Algebra-2

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