The consumption function of the U.S. economy from 1929 to 1941 is , where  is the personal consumption expenditure and x is the personal income, both measured in billions of dollars. Find the rate of change of consumption with respect to income,

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? 



A.
B.
C.
D.
E.

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Answer: D

Mathematics

Solve the problem.A company is constructing an open-top, square-based, rectangular metal tank that will have a volume of  What dimensions yield the minimum surface area? Round to the nearest tenth, if necessary.

A. 11.6 ft × 11.6 ft × 0.5 ft B. 4.1 ft × 4.1 ft × 4.1 ft C. 5.9 ft × 5.9 ft × 2 ft D. 5.1 ft × 5.1 ft × 2.6 ft

Answer the question.Inscribe a circle into an acute triangle.

What will be an ideal response?

Answer the question.For f(x) = 3x + 9 and g(x) = 4, what is the domain of f?g?

A.
B.
C.
D. All real numbers

Find the percent using a proportion. Round your answer to the nearest tenth if necessary.52.4 meters is what percent of 6 meters?

A. 8733% B. 1.2% C. 11.5% D. 873.3%