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. 35.8%; $209 million
B. 37.5%; $210 million
C. 39.6%; $209 million
D. 34.9%; $207 million
Answer: C
Mathematics
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for n
A. n = 
B. n = IR(Ir - E)
C. n = 
D. n = 
Mathematics
Multiply.(x + 9)(x - 9)
A. x2 - 18 B. x2 - 18x - 81 C. x2 + 18x - 81 D. x2 - 81
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Graph the function.y = 5e-x + 3
A. 
B. 
C. 
D. 
Mathematics
Decide if the given number is a solution to the given equation.7r2 + 5 = 309.92; 6.6
A. Yes B. No
Mathematics