Solve the problem.The cost of manufacturing clocks is given by C(x) = 56 + 31x - x2. Also, it is known that in t hours the number of clocks that can be produced is given by x = 12t, where 
Express C as a function of t.
A. C(t) = 56 + 372t - 144t2
B. C(t) = 56 + 372t - 144t
C. C(t) = 56 + 31t + t2
D. C(t) = 56 + 31t - 12
Answer: A
Mathematics
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, (-3, -8)
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C. y = 
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D. y = 
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? 
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B. 2
C. 
D. 
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