Solve the problem. Round as appropriate.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 foot-candles, find the intensity on a screen 20 ft from the light.
A. 3/16 foot-candle
B. 3/17 foot-candle
C. 2 foot-candles
D. 1 3/16 foot-candles
Answer: A
Mathematics
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Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
- 3 ? x ? 3, about the x-axis (dimensions are in feet). How many cubic feet of fuel will the tank hold to the nearest cubic foot?
A. 13 B. 10 C. 3 D. 5
Mathematics
Find the slope and the y-intercept.x = 1
A. m = 1; b = 0 B. m is undefined; b = 1 C. m = 0; b = 1 D. m is undefined; no y-intercept
Mathematics
Rewrite the following using radicals; then simplify if possible.
1/2
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Convert to a rectangular equation.r = 2 csc ?
A. y = 2 B. x2 + y2 = 2 C. x = 2 D. y2 = 2
Mathematics