Wheat production in a given year, W, depends on the average temperature T and the annual rainfall R. Scientists estimate that the average temperature is rising at a rate of 0.15 °C/year and rainfall is decreasing at a rate of 0.1 cm/year. They also estimate that, at current production levels, ∂W/∂T = - 2 and ∂W/∂R = 8.

(a) What is the significance of the signs of these partial derivatives?

(b) Estimate the current rate of change of wheat production, dW/dt.

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Scientists estimate that the average temperature is rising : question wheat production in a given year w depends on the average temperature t and the annual rainfall r. scientists |

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They also estimate that at current production levels : wheat production in a given year w depends on the average temperature t and the annual rainfall r. scientists estimate |

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