An efficiency study of the afternoon shift at a factory (noon to 5 P.M.) indicates that an average worker who arrives on the job at noon will have produced

units t hours later.

a. When during the afternoon shift does the worker’s production reach the point of diminishing returns?

b. At what time during the afternoon shift is the worker performing least efficiently?

Transcribed Image Text:

Q(t) = -²³ + 6t² + 15t