Each of Exercises 61 through 68 involves either the chain rule for partial derivatives or the incremental

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Each of Exercises 61 through 68 involves either the chain rule for partial derivatives or the incremental approximation formula for functions of two variables.

Using x hours of skilled labor and y hours of unskilled labor, a manufacturer can produce Q(x, y) = 10xy^1/2 units. Currently 30 hours of skilled labor and 36 hours of unskilled labor are being used. Suppose the manufacturer reduces the skilled labor level by 3 hours and increases the unskilled labor level by 5 hours. Use calculus to determine the approximate effect of these changes on production.

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