2. The output of a certain plant is Q(x, y) = 0.19x2 + 0.12.y + 0.02y?
units per day, where x is the number of hours of skilled labor used y is the number
of unskilled workers used. Currently 100 hours of skilled labor and 300 hours of un-
skilled labor are used each day. Estimate the change in unskilled labor that should
be made to offset a 1-hour increase in skilled labor so that the output remains the
same as before.