Decide if the answer is reasonable or unreasonable by rounding the numbers and estimating the answer. If the answer is not reasonable, find the correct answer.2213.8 ÷ 21.5 = 10.3
A. Unreasonable, should be 103
B. Unreasonable, should be 1030
C. Unreasonable, should be 1.03
D. Reasonable
Answer: A
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Solve the problem.Sarah Katerinov is a high school student in Chicago. She will be going to college next year and is planning to visit the following campuses: University of Wisconsin at Madison, Harvard, and Ohio State University. How many different ways can she visit each of these schools and return to her starting point in Chicago?
A. 12 B. 5 C. 6 D. 24
Write the first six terms of the arithmetic sequence with the first term, a1, and common difference, d.a1 = 11; d = -2
A. 11, 9, 7, 5, 3, 1 B. 13, 11, 9, 7, 5, 3 C. 11, 9, 6, 5, 3, 1 D. 9, 7, 5, 3, 1, -1
Graph the inequality.
+ 
? 1
A. 
B. 
C. 
D. 
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. 37.5%; $210 million B. 39.6%; $209 million C. 35.8%; $209 million D. 34.9%; $207 million