State the domain and range in interval notation.f(x) = 2x2 + 2x - 8
A. domain: (-?, ?); range: 
B. domain: (-?, ?); range: 
C. domain: (-?, ?); range: 
D. domain: 
; range: (-?, ?)
Answer: C
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Classify as true or false, assuming that a, b, c, and d are whole numbers and d ? 0.If d
and d
, then d
for any whole numbers x and y.
A. True B. False
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. 27.0%; $379 million B. 30.9%; $382 million C. 28.8%; $272 million D. 38.4%; $383 million
Write the ratio in simplest form.The length of the garden is 56 feet. The width is 32 feet. Write the ratio of the width to the length.
A. 
B. 
C. 
D. 
Find the square root if it is a real number, or state that the expression is not a real number.-
A. 0.07 B. -0.07 C. not a real number D. -0.7