Solve the problem.Suppose c(x) = x3 - 20x2 + 20,000x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.
A. 11 items
B. 10 items
C. 9 items
D. 12 items
Answer: B
Mathematics
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Solve the inequality. Express your answer using interval notation.0 < (4x - 10)-1 < 
A. (- ?, 3]
B. (- ?, 3)
C. (3, ?)
D. [3, ?)
Mathematics
Find all numbers u (if any) so that the given point (u, y) or (x, u) is on the unit circle.
A. ± 
B. None
C. ± 
D. ± 
Mathematics
Identify the equation without applying a rotation of axes.3x2 + 3xy + 3y2 + 3x + 3y + 10 = 0
A. hyperbola B. ellipse C. parabola D. not a conic
Mathematics
Subtract.
A. 2640 B. 2720 C. 268 D. 2732
Mathematics