The number of units of weekly output of a certain product is represented by the equation shown below, where x is the number of workers on the assembly line. There are presently 68 workers on the line.
Q(x) = 200x + 4x2
(a) Find Q'(x) and estimate the change in the weekly output caused by the addition of one worker.
(b) Calculate Q(69) − Q(68) to see the actual change in the weekly output.
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Q ( 60 )
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