Find 
.y = (x2 + 7x)40
A. 40(x2 + 7x)39(2x + 7)
B. 40(x2 + 7x)38(158x2 + 1106x + 1911)
C. 1560(x2 + 7x)38
D. 40(x2 + 7x)38(2x2 + 92x + 273)
Answer: B
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Provide an appropriate response.Explain how the annual depreciation amount is found using the units-of-production method.
What will be an ideal response?