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 3 
find the intensity on a screen 15 ft from the light.
A. 1 
foot-candles
B. 
foot-candle
C. 2 foot-candles
D. 
foot-candle
Answer: B
Mathematics
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Multiply. Write the answer in simplest form.
? - 
A. - 
B. - 
C. - 
D. - 
Mathematics
Evaluate the expression by hand.5121/3
A. 8 B. 4096 C. 24 D. 12,288
Mathematics
Solve the system using Gauss-Jordan elimination.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Write the fraction as a decimal. If the decimal is a repeating decimal, write using the bar notation and then round to the nearest hundredth. 
A. 0.
? 0.81
B. 0.
? 0.89
C. 0.88
D. 0.
? 0.88
Mathematics