Charlie Consumes Apples and Bananas $\mathbf{U}\left(X_{A}, X_{B}\right)=x_{A} x^{2} B$

Charlie consumes apples and bananas. His utility function is $\mathbf{U}\left(X_{A}, X_{B}\right) =x_{A} x^{2} B$
-refer to scenario above ,Charlie's utility function is x_Ax_B.The price of apples used to be $1 per unit, and the price of bananas $2 per unit.His income was $40 per day.If the price of apples increased to $1.50 and the price of bananas fell to $.75, then in order to be able to just afford his old bundle, Charlie would have to have a daily income of

A) $56.25.
B) $37.50.
C) $76.
D) $18.75.
E) $150.

Correct Answer:

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