Charlie's utility function is U(x_A, x_B)  x_Ax_B.If Charlie's income were $40, the price of apples were $4, and the price of bananas were $6, how many apples would there be in the best bundle that Charlie could afford?

A) 8
B) 10
C) 12
D) 9
E) 5

Utility Function

A function that reflects the satisfaction or utility a consumer derives from consuming goods or services.

Budget Constraint

A constraint on the combinations of goods a consumer is able to purchase, determined by their income level and the costs of these items.

Income

The income earned from labor or investments, often received periodically.