Solve the formula for the given letter.
A. 
B. 
C. 
D. 
E. 
Answer: D
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The set of __________ numbers is {1, 2, 3, 4, ... }.
A. irrational B. integer C. natural D. whole E. negative
Solve the problem.Refer to the following preference schedule. If the Borda count method is used to determine the winner, is Fairness Criterion 1 satisfied?
A. Yes B. No
Find the exact value of the trigonometric expression without the use of a calculator.If sin ? = - 
, ? < ? < 
and tan ? = - 
, 
< ? < ?, find the exact value of cos (? + ?).
A. 
B. 
C. 
D. 
Solve the problem.Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 40 seconds, while Melissa's car completes a revolution in 35 seconds. How long will it take them before both cars reach the starting point again simultaneously?
A. 560 sec B. 280 sec C. 112 sec D. 56 sec