Answer the question.Which of the following describes a study in which the patients do not know whether they are receiving the treatment or the placebo but the experimenters do know?
A. Case-control study
B. Double-blind experiment
C. Single-blind experiment
D. Observational study
Answer: C
Mathematics
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Evaluate the improper integral.
A. 
B. 
C. 
D. 
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Provide the appropriate response.Find the least positive number divisible by two primes.
A. 4 B. 2 C. 3 D. 6
Mathematics
Add.10 + -1
A. 
B. 9
C. 
D. 11
Mathematics
Solve the problem.Mr. and Mrs. Gutierrez borrow $8500 to buy a new car. The loan is to be paid off in 34 monthly payments. How much is each payment?
A. $250 B. $25 C. $8466 D. $8534
Mathematics