In order to answer the given question, which of the following types of study would be the most appropriate: an experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational study, or a case-control study?Does caffeine cause birth defects?
A. Experiment without blinding
B. Experiment with single blinding
C. Case-control study
D. Experiment with double blinding
E. Observational study
Answer: C
Mathematics
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Solve the given inequality (a related function is graphed).
? 0 
A. [-2, 2] B. (-?, -2) ? (2, ?) C. (-2, 2) ? [2, ?) D. (-2, 2)
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Find the volume of the solid generated by revolving the region about the y-axis.The region in the first quadrant bounded on the left by the circle x2 + y2 = 16, on the right by the line 
, and above by the line y = 4
A. 64?
B. 16?
C. 
?
D. 
?
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Simplify by first converting to rational exponents. Assume that all variables represent positive real numbers.
? 
A. 
B. 
C. 
D. 
Mathematics
Find the zeros of the function. Give exact answers.f(x) = 5x2 - x + 3
A. 
± 
i
B. 
± 
i
C. 1 ± 
D. - 
, 
Mathematics