Find the perimeter of the polygon.
A. 21 m
B. 12.2 m
C. 19.3 m
D. 10.5 m
Answer: A
Mathematics
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Solve the problem.The lower edge of a dam is defined by the parabola (see figure). Use a coordinate system with y = 0 at the bottom of the dam to determine the total force on the dam. Lengths are measured in meters. 
A. 60,963,840 N B. 13,547,520 N C. 243,855,360 N D. 121,927,680 N
Mathematics
Solve the system.(y - 1)2 = -x-(y + 1)2 = x - 8
A. (1, -2) B. (-1, -2) C. (1, 2) D. (-1, 2)
Mathematics
Graph y = f(x).f(x) = |x + 5|
A. 
B. 
C. 
D. 
Mathematics
Determine the amplitude, range, and period of the function and sketch its graph.y = cos 
A. amplitude: 1; range: [-1, 1]; period: ?
B. amplitude: 1; range: [-1, 1]; period: 2?
C. amplitude: 
; range: 
; period: 2?
D. amplitude: 1; range: [-1, 1]; period: 2?
Mathematics