Rachel spends her income,Y,on Rock Shows (R)and Sunglasses (S)with prices p_R and p_S.Rachel's preferences are given by the Cobb-Douglas utility function
U(X,Y)= R^.8S^.2
a.Write out the Lagrangian for Rachel's utility-maximization problem.
b.Use the Lagrangian to derive Rachel's optimal choice, (R^*,S^*).
c.For a given utility level,U₀,derive Rachel's Expenditure function E(p_R,p_S,U₀).
d.Use the Expenditure function to derive Rachel's compensated demand for Rock Shows.

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The Answer of Rachel spends her income,Y,on Rock Shows (R)and Sunglasses (S)with prices p_R and p_S.Rachel's preferences are given by the Cobb-Douglas utility function U(X,Y)= R^.8S^.2 a.Write out the Lagrangian for Rachel's utility-maximization problem. b.Use the Lagrangian to derive Rachel's optimal choice, (R^*,S^*). c.For a given utility level,U₀,derive Rachel's Expenditure function E(p_R,p_S,U₀). d.Use the Expenditure function to derive Rachel's compensated demand for Rock Shows.

Rachel Spends Her Income,Y,on Rock Shows (R)and Sunglasses (S)with Prices