Solve.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 4 foot candles, find the intensity on a screen 20 ft from the light. Express the answer as a fraction.
A. 
foot-candle
B. 4 foot-candles
C. 
foot-candle
D. 2 foot-candles
Answer: A
Mathematics
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A. (-4, -1) B. (4, 0) C. Inconsistent D. (-5, 0)
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Solve the equation.(x + 6)(x - 1) = (x + 1)2
A. 
B. 
C. 
D. 
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Evaluate the following expression. (x ? ?/10 + ?n, where n is a whole number)
?
?
A. 
B. 
C. 
D. 
E. 
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Candidate A was one of four candidate in an election. Of 28,405 votes cast, 4,840 were for Candidate A. What angle of a circle would show the percent of votes not cast for Candidate A?Round your answer to the nearest tenth.
A. 305.9o B. 300.3o C. 307.2o D. 152.9o E. 298.7o
Mathematics