Find the sum, if it exists.
A. 
B. 
C. 
D. Does not exist
Answer: C
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Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 - 4x + 8
A. Opens: Down;
Vertex: (2, -4);
x-intercepts: none;
y-intercept: (0, -8)
B. Opens: Up;
Vertex: (2, 4);
x-intercepts: none;
y-intercept: (0, 8)
C. Opens: Up;
Vertex: (2, -4);
x-intercepts: (0, 0) and (4, 0);
y-intercept: (0, 0)
D. Opens: Up;
Vertex: 
;
x-intercepts: (1, 0) and (8, 0);
y-intercept: (0, 8)
Find the distance between a and b. ? a = 9.38, b = -5.97 ?
A. 4.91 B. 3.91 C. 3.41 D. 15.85 E. 15.35
Solve the problem.The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by 
where t is the number of hours since the worker's shift began. Assuming that 
find E(t).
A. E(t) = 55t - 2t2 + 141 B. E(t) = 55t - 2t2 + 35 C. E(t) = 55t - 4t2 + 35 D. E(t) = 55t - 2t2 + 88
VR6 = 15 V, VR1 = 3 V, and VR2 = 4 V. Solve for VR 5.
a. 3 V
b. 4 V
c. 8 V
d. 12 V
e. 15 V