Solve the problem.The cost in millions of dollars for a company to manufacture x thousand automobiles is given by the function C(x) = 3x2 - 12x + 36. Find the number of automobiles that must be produced to minimize the cost.
A. 6 thousand automobiles
B. 2 thousand automobiles
C. 24 thousand automobiles
D. 4 thousand automobiles
Answer: B
Mathematics
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A. 
B. 
C. - 
D. 
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Use one of the following distance formulas to answer the question. d = r ? t
r = 
t = 
If Jin drives 
in 6 hours, what is her average speed during the trip?
A. 240 mph B. 40 mph C. 36 mph D. 34 mph
Mathematics
Solve.An equilateral triangle has a side length of 2.4 yd. Find its perimeter.
A. 9.6 yd B. 7.2 yd C. 4.8 yd D. not enough information given
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Subtract.(8x3 + 3x5 + 2 + 4x4) - (4 - 2x4 + 7x5 + 3x3)
A. 10x5 + 2x4 + 11x3 - 2 B. -4x5 + 6x4 + 5x3 - 2 C. 10x5 + 2x4 + 11x3 + 6 D. -4x5 + 2x4 + 11x3 + 6
Mathematics