Find the magnitude of the vector.
?
?
A. ?
B. ?
C. ?
D. 
E. ?
Answer: D
Mathematics
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Solve the problems.On a map of the Fox River, 1 centimeter represents 6 kilometers. If a trail by the river is actually 20.40 kilometers long, what is the length of the river on the map? Round to nearest tenth.
A. 5.4 centimeters B. 9.4 centimeters C. 3.4 centimeters D. 14.4 centimeters
Mathematics
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Mathematics
Solve the system by elimination.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression.
A. 362,880 B. 40,320 C. 336 D. 5040
Mathematics