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. 31.4%; $464 million
B. 26.5%; $469 million
C. 29.7%; $467 million
D. 28.1%; $470 million
Answer: B
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Find the sum, if it exists.0.02 + 0.002 + 0.0002 + 0.00002 + . . .
A. 
B. 0
C. 
D. Does not exist
Solve the problem.Suppose that the x-intercepts of the graph of y = f(x) are 2 and 3. What are the x-intercepts of 
A. -2 and 3 B. 2 and -3 C. -2 and -3 D. 2 and 3
Solve the problem.The following data represents the normal monthly precipitation for a certain city in California. 
Draw a scatter diagram of the data for one period. Find a sinusoidal function of the form 
that fits the data. Draw the sinusoidal function on the scatter diagram. Use a graphing utility to find the sinusoidal function of best fit. Draw the sinusoidal function of best fit on the scatter diagram.
What will be an ideal response?
Find the unknown length in the right triangle. Simplify the answer if necessary.
A. 5
B. 10
C. 20
D. 24