Find the domain of the expression.
A. {x|x ? -4 and x ? -2}
B. {x|x ? 3 and x ? -3}
C. {x|x ? 4 and x ? 2}
D. {x|x ? 0}
Answer: A
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Given that the polynomial function has the given zero, find the other zeros.f(x) = x4 - 36; 
A. 
i
B. -6i, 6i, -
C. -
i, 
i, -
D. -
Governments often impose _____ to restrict the quantities of foreign products that multinational firms can bring into their countries.
A. stockout rules B. negative tariffs C. quotas D. custom exclusions E. expropriation restrictions
Write the number in words.45,021
A. forty-five thousand, two hundred one B. forty-five hundred, twenty-one C. forty-five hundred thousand, twenty-one D. forty-five thousand, twenty-one
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. 28.8%; $272 million B. 27.0%; $379 million C. 30.9%; $382 million D. 38.4%; $383 million