Graph the equation.y = -4x2 
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.Find the slope of the tangent to the curve of the intersection of the surface 2z = 
and the plane x = 1 at the point 
A. 
B. 
C. 
D. 
Solve the problem.Two angles are supplementary, and one is 40° more than three times the other. Find the smaller angle.
A. 145° B. 35° C. 75° D. 105°
Solve.Suppose economists use as a model of a country's economy the function N(x) = 0.7478x + 6.0802,where N represents the consumption of products in billions of dollars and x represents disposable income in billions of dollars. a. Identify the dependent and independent variables.b. Evaluate N(9.52)and explain what it represents.
A. a. The dependent variable is the number of billions of dollars, N, and the independent variable is the disposable income in billions of dollars. b. N(9.52) = $4.4 billion; According to the model, the number of billions of dollars for the consumption of products is $4.4 billion. B. a. The dependent variable is the number of billions of dollars, N, and the independent variable is the disposable income in billions of dollars. b. N(9.52) = $4.6 billion; According to the model, the number of billions of dollars for the consumption of products is $4.6 billion. C. a. The dependent variable is the number of billions of dollars, N, and the independent variable is the disposable income in billions of dollars. b. N(9.52) = $13.2 billion; According to the model, the number of billions of dollars for the consumption of products is $13.2 billion. D. a. The dependent variable is the number of billions of dollars, N, and the independent variable is the disposable income in billions of dollars. b. N(9.52) = $5.2 billion; According to the model, the number of billions of dollars for the consumption of products is $5.2 billion.
Express the value in scientific notation.
A. 7.8 × 108 B. 3.9 × 108 C. 7.8 × 10-2 D. 3.9 × 10-2