Solve the problem.The cost to make a product is M(x,y) = 6x2 + 2y2 - 4xy + 50, where x is material cost, y is labor cost. The company spends $8 on materials and $9 on labor. Use the differential to estimate the change in cost if the company spends $13 on materials and $8 on labor.
A. $296
B. -$8
C. -$600
D. $600
Answer: A
Mathematics
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+ 
A. 
B. 
C. 
D. 
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