9. Growth of a Baby. The median weight of a girl whose age t is between 0 and 36 mo can be approximated by the function w(t) = 7.6 +1.61t - 0.0484t² + 0.00061³, where t is measured in months and w is measured in pounds. Use this approximation to make the following computations for a girl with median weight. 10 a) The rate of change of weight with respect to time b) The weight of the girl at birth c) The rate of change of the weight of the girl at birth d) The weight of the girl on her first birthday e) The rate of change of the girl's weight with respect to time on her first birthday f) The average rate of change of the girl's weight during her first year of life g) A time when the instantaneous rate of change is the same as the average rate of change over the first year

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