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 the new medication relieve depression?
A. Observational study
B. Case-control study
C. Experiment with single blinding
D. Experiment without blinding
E. Experiment with double blinding
Answer: E
Mathematics
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A recursion formula and the initial term(s) of a sequence are given. Write out the first five terms of the sequence.a1 = 1, an+1 = 
A. 1, 
, 12, 
, 360
B. 1, 
, 
, 
, 
C. 1, 
, 
, 
, 
D. 1, 
, 
, 
, 
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Find the zeros of the function. Give exact answers.f(x) = x2 - 7x + 3
A. 
B. 
C. 
D. 
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Write the number in scientific notation.420,000
A. 4.2 × 10-6 B. 4.2 × 105 C. 4.2 × 10-5 D. 4.2 × 106
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Find the due date.Date made: June 5Term of loan: 90 days
A. September 5 B. August 5 C. September 3 D. September 4
Mathematics