Graph the function.y = -csc x
A. 
B. 
C. 
D. 
Answer: D
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Use the root test to determine if the series converges or diverges.
A. Converges B. Diverges
Solve the problem.A certain noise has an intensity I of 
. Given that decibel level D is related to intensity by 
, where I0 is 10-12, determine the decibel level of the noise. Round to the nearest decibel.
A. 75 decibels B. 195 decibels C. 85 decibels D. 8 decibels
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
Describe the set of points (x, y, z) defined by the equation.x = -2 and z = -1
A. All points of the form (-2, y, -1) B. All points of the form (-1, y, -2) C. All points of the form (-2, -1, 0) D. Only the point (0, 0, -1)