The initial tableau of a linear programming problem is given. Use the simplex method to solve the problem. 
A. Maximum at 8 for x3 = 2, s1 = 2
B. Maximum at 12 for x1 = 2, x3 = 2
C. Maximum at 4 for x2 = 2, s1 = 2
D. Maximum at 6 for x3 = 2, s1 = 2
Answer: D
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Find the moment or center of mass of the wire, as indicated.Find the center of mass of a wire that lies along the first-quadrant portion of the circle 
if the density of the wire is 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
The number N, measured in millions of students, enrolled in high school t years after 1965 is given approximately by
?
.
According to this model, in what year (as a date) did high school enroll reach a maximum, and what was the maximum enrollment? Round your answers to two decimal places.
?
A. The maximum enrollment of 13.68 million occurred in 1977. B. The maximum enrollment of 12.00 million occurred in 1981.00. C. The maximum enrollment of 13.44 million occurred in 1984. D. There is no maximum value.
Find the area of the shaded region.
A. 1445 m2 B. 867 m2 C. 204 m2 D. 1156 m2
Solve graphically.y = 2x - 14x - 2 = 2y
A. Infinitely many solutions B. No solution C. (0, -1) D. (0, 1)