Simplify.
÷ 
A. 
B. 4
C. 
D. 
Answer: C
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Perform the indicated operations and write the answer in the form 
where a and b are real numbers.(-6 - 8i)(-6 + 8i)
A. 100 B. 36 + 64i2 C. -28 D. 36 - 64i2
Suppose 
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
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?
The quantity dS/dx is called the marginal propensity to save.
?
For the consumption function 
, find the marginal propensity to save.
?
A. $0.43 billion/billion dollars
B. $0.286 billion/billion dollars
C. $0.68 billion/billion dollars
D. $0.337 billion/billion dollars
Simplify the expression. Assume all variables represent positive real numbers.6
- 2
- 
A. 17x
B. 18x
C. 4x
D. 3x
Provide an appropriate response.Find the equation of the tangent line at x = 7 for f(x) = 6 - x2. Write the answer in the form y = mx + b.
A. y = - 2x B. y = - 14x + 55 C. y = 14x - 55 D. y = 7x + 55