Find the absolute value.
A. 
B. 
C. 0
D. - 
Answer: A
Mathematics
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Find the amplitude, period or displacement.Find the period of y = 2 cos 
.
A. 
B. 8?
C. 4?
D. 2?
Mathematics
Identify the quadrant for the angle ? satisfying the following conditions.sin ? > 0 and cos ? > 0
A. Quadrant IV B. Quadrant II C. Quadrant III D. Quadrant I
Mathematics
Solve the problem.A railroad tunnel has the shape of half an ellipse. The height of the tunnel at the center is 42 ft and the vertical clearance must be 6 ft at a point 12 ft from the center. Find an equation for the ellipse, where x and y are measured in ft. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Name the quadrant in which the point is located.(-8, 9)
A. I B. II C. III D. IV
Mathematics