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 an hour of meditation per day lower blood pressure?
A. Case-control study
B. Experiment with single blinding
C. Observational study
D. Experiment with double blinding
E. Experiment without blinding
Answer: E
Mathematics
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The function 
satisfies the equation of change 
. For what value of f is f increasing at the fastest rate? Round your answer to two decimal places, if necessary.
?
A. ?
B. ?
C. 
D. ?
Mathematics
Factor completely, or state that the polynomial is prime.49x2 - 42x + 9
A. (7x + 3)2 B. (7x - 3)(7x + 3) C. (49x + 1)(x + 9) D. (7x - 3)2
Mathematics
Multiply.(x2 + x - 10)(x2 + x - 4)
A. x4 + x3 + 15x2 + 14x + 40 B. x4 + x3 - 14x2 - 14x + 40 C. x4 + 2x3 + 14x2 - 6x + 40 D. x4 + 2x3 - 13x2 - 14x + 40
Mathematics
Solve the equation.
- 
= 
A. {5} B. {-4} C. ? D. {4}
Mathematics