Solve.
= 1 - 3y
A. 
B. 
C. 
D. - 
Answer: B
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Find the volume of the solid. When appropriate, use ? ? 3.14 and round to the nearest hundredth.
A. 781.25 in.3 B. 981.25 in.3 C. 9812.50 in.3 D. 2453.13 in.3
Use a graphing utility to graph the polar equation.r = 4 sin 
A. 
B. 
C. 
D. 
Solve the system by graphing.3x + 2y = 13-2x + 3y = 0
A. {(3, 6)} B. {(2, 3)} C. {(3, 2)} 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. 34.0%; $271 million B. 36.6%; $268 million C. 35.8%; $276 million D. 41.2%; $264 million