Graph the function and give its domain and its range.f(x) = 
A. [0, ?); [1, ?)
B. [1, ?); [0, ?)
C. [-1, ?); [0, ?)
D. [0, ?); [-1, ?)
Answer: C
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (2, 1) for ln x + xy2 + ln y = 0.
A. -1
B. 
C. 1
D. - 
Refer to this figure to answer the question. Assume 
and 
are parallel.
What is the vertex of ?DEI?
A. I B. E C. D
Solve the equations by finding the exact solution.
?
?
A. 
B. 
C. 
D. 
E. 
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. 36.6%; $268 million B. 34.0%; $271 million C. 41.2%; $264 million D. 35.8%; $276 million