Solve the problem.Economists use what is called a Leffer curve to predict the government revenue for tax rates from 0% to 100%. Economists agree that the end points of the curve generate 0 revenue, but disagree on the tax rate that produces the maximum revenue. Suppose an economist produces this rational function 
where R is revenue in millions at a tax rate of x percent. Use a graphing calculator to graph the function. What tax rate produces the maximum revenue? What is the maximum revenue?
A. 27.0%; $379 million
B. 30.9%; $382 million
C. 28.8%; $272 million
D. 38.4%; $383 million
Answer: B
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Which of the following is not the definition of dilation? ?
A. ?Dilation is a transformation from which a figure is increased or decreased in size with respect to a line of symmetry. B. ?Dilation is a transformation from which a figure is increased or decreased in size with respect to a fixed point. C. ?Dilation is a reflection at a vertical line, in which a figure is increased or decreased in size. D. ?Dilation is an increase in the size of the figure at a line of symmetry. E. ?None of the above.
Translate to a proportion and solve. What percent of 168 is 42?
A. 4% B. 26% C. 5% D. 25%
Use the product rule to simplify the expression.x6 ? x2 ? y8 ? y5
A. x12y10 B. x8y14 C. x11y10 D. x8y13
Find the y-intercept and graph the equation by hand.y = 4x
A. (0, -4)
B. (0, 0)
C. (0, 0)
D. (0, 4)