Short Answer
Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then, measures the economy's savings corresponding to an income of x billion dollars. Then
. The quantity
is called the marginal propensity to save. For the consumption function
, where C(x) and x are measured in billions of dollars, find the marginal propensity to save when
.
Round the answer to three decimal places, if necessary. $__________ billion/billion dollars
Correct Answer:

Verified
Correct Answer:
Verified
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