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. 35.8%; $276 million
B. 41.2%; $264 million
C. 34.0%; $271 million
D. 36.6%; $268 million
Answer: D
Mathematics
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (9 sin 
t + 7)i + (9 cos 13t) - 6)j + 5tk; osculating plane at t = 0.5?.
A. 
(y + 6) + 9
= 0
B. 
(x - 7) + 9
= 0
C. 
(y + 6) + 9
= 0
D. 
(y - 6) + 
= 0
Mathematics
Explain why HL is a valid congruence condition even though SSA is not necessarily a valid congruent condition.
What will be an ideal response?
Mathematics
Match the given data with one of the box plots from the Table of Box Plots.
137, 167, 154, 170, 171, 184, 175, 190,203, 208, 192, 210, 212, 214, 216
A. III B. IV C. I D. II
Mathematics
Find the union of the two sets.{3, 5, 6, 8} ? ?
A. ? B. {3, 5, 6, 8} C. {6, 8} D. {3, 5}
Mathematics