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 20 ft from the light.
A. 
foot-candle
B. 
foot-candle
C. 2 foot-candles
D. 1
foot-candles
Answer: B
Mathematics
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A. ba - 24 B. -4a + 6b C. 4a - 6b D. 24 - ab
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Find the area of an equilateral triangle with perimeter 27 meters. Round the answer to two decimal places.
What will be an ideal response?
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A. 100 B. 81 C. 180 D. 90
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