Solve the problem.The cost in millions of dollars for a company to manufacture x thousand automobiles is given by 
Find the output at the vertex of the parabola (the number of automobiles that must be produced to minimize the cost).
A. 8 thousand automobiles
B. 64 thousand automobiles
C. 12 thousand automobiles
D. 4 thousand automobiles
Answer: D
Mathematics
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Solve the inequality. Graph the solution set and write the solution set in set-builder notation.4x2 + 19x - 5 ? 0
A. 
B. 
C. 
D. 
Mathematics
List all the elements of B that belong to the given set.B = {9, 
, -11, 0, 
, 
, 0.17, -6?, 0.161616...}Rational numbers
A. 
B. 
C. 
D. 
Mathematics
Write the improper fraction as a mixed number or an integer.
A. 4
B. 
C. 3
D. 2
Mathematics
Use the rules of exponents to simplify the expression. Use positive exponents to write the answer.(-4x-1y-2)2
A. 
B. 
C. - 
D. 16x2y4
Mathematics