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 0.14°/year and rainfall is decreasing at a rate of 0.1 cm/year. They also estimate that, at current aW production levels, = -2 and aW ƏT ƏR dW production dt = 5. Estimate the current rate of change of wheat

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