Assume that Jane's marginal propensity to consume equals 0.8, and that in 2004 Jane spent $36,000 from her disposable income of $40,000. If her disposable income in 2005 increased to $50,000, her consumption spending increased by

A) $4,000
B) $8,000
C) $9,000
D) $10,000
E) $14,000

Ans: B) $8,000

Economics

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Suppose the market demand curve for pizza can be expressed as QD = 100 - 2P + 3Pb, where QD is the quantity of pizza demanded, P is the price of pizza, and Pb is the price of a burrito. What is the relationship between burritos and pizza, from the point of view of consumers?

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