Write an equation that expresses the relationship. Use k as the constant of variation.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 36 ft from a light is 3.9 foot-candles, find the intensity on a screen 90 ft from the light.
A. 9.75 foot-candles
B. 24.38 foot-candles
C. 1.56 foot-candles
D. 0.624 foot-candles
Answer: D
Mathematics
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