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 foot candles, find the intensity on a screen 15 ft from the light.
A. 1
foot-candles
B. 
foot-candle
C. 
foot-candle
D. 2 foot-candles
Answer: C
Mathematics
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Find the derivative of y with respect to the independent variable.y = 2
A. 
2
B. 2
ln 2
C. 
D. 
2
Mathematics
Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
19 km
A. 617 km B. 17.5 km C. 24.839 km D. 308.5 km
Mathematics
Verify the identity.csc 
= sec x
What will be an ideal response?
Mathematics
Find the slope-intercept form for the line satisfying the conditions.x-intercept -9, y-intercept -1
A. y = - 9x - 9
B. y = 9x - 9
C. y = - 
x - 1
D. y = 
x - 1
Mathematics