Solve the problem.The cost of manufacturing clocks is given by C(x) = 70 + 48x - x2. Also, it is known that in t hours the number of clocks that can be produced is given by x = 7t, where 
Express C as a function of t.
A. C(t) = 70 + 48t - 7
B. C(t) = 70 + 336t - 49t
C. C(t) = 70 + 48t + t2
D. C(t) = 70 + 336t - 49t2
Answer: D
Mathematics
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