Find the exact value of the expression.cos 840°
A. 
B. - 
C. - 
D. - 
Answer: D
Mathematics
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Solve for the percentage in the problem. Round to the nearest tenth of a percent. % of 125 cartons is 18.9 cartons.
A. 661.4 B. 15.1 C. 0.2 D. 0.1
Mathematics
Solve.
+ 
= 0
A. {-4, 4} B. {4} C. {-4, 0, 4} D. ?
Mathematics
Make a line graph using the given frequencies.A medical research team studied the ages of patients who had strokes caused by stress. The results of 34 patients are as follows: 
?
A. 
B. 
C. 
D. None of the above
Mathematics
Solve the quadratic equation by the method of your choice.2x2 - 7 = 13x
A. 
B. {-2, 7}
C. 
D. 
Mathematics