Write a general formula to describe the variation.The illumination I produced on a surface by a source of light varies directly as the candlepower c of the source and inversely as the square of the distance d between the source and the surface.
A. I = 
B. I = kcd2
C. I = 
D. I = 
Answer: D
Mathematics
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Simplify the radical. Assume that all variables represent positive real numbers.
A. 
B. 3
C. 
D. 
Mathematics
Name the property used to go from step to step indicated by an a), b), c), or d).
What will be an ideal response?
Mathematics
Simplify the expression involving rational exponents.- 
1/2
A. - 
B. 
C. - 
D. Not a real number
Mathematics
Solve.Find an equivalent expression for sin 4x in terms of function values of x.
A. 8 sin x cos3 x - 4 sin x cos x B. 8 sin x - 4 sin x cos x C. 8 cos4 x - 2 sin x cos x D. 8 sin x cos3 x - 4 sin3 x cos x
Mathematics