Solve the problem.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 5 ft from a light is 2 foot-candles, find the intensity on a screen 10 ft from the light.
A. 
foot-candle
B. 1 
foot-candles
C. 2 foot-candles
D. 
foot-candle
Answer: D
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