The rate of depreciation 
of a machine is inversely proportional to the square of 
, where V is the value of the machine t years after it was purchased. The initial value of the machine was $500,000 and its value decreased $100,000 in the first year. Estimate its value after 6 years. Round your answer to the
nearest integer.
?
A. $500,000
B. $475,000
C. $275,000
D. $350,000
E. $550,000
Answer: C
Mathematics
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Perform the indicated operations.
A. 
B. 
C. 
D. 
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.y = 7x3, y = 7x, for x ? 0
A. 
?
B. 
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C. 
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D. 
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Represent the linear system as an augmented matrix. 2x - 2y + 5z = -16-2x + 9y + 3z = 56 7x + 7y + 4z = 83
A. 
B. 
C. 
D. 
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