WORKER EFFICIENCY An efficiency study of the morning shift at a certain factory indicates that an average worker who arrives on the job at 8:00 a.m. will have assembled
f (x) = − x3 + 6x2 + 15x units x hours later.
a.Derive a formula for the rate at which the worker will be assembling units after xhours.
b.At what rate will the worker be assembling units at 9:00 a.m.?
c.How many units will the worker actually assemble between 9:00 a.m. and 10:00 a.m.?
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