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
Answer: B
Mathematics
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Solve the problem.Find the area between y = (x - 3)ex and the x-axis from x = 3 to x = 8.
A. 4e8 + e3 B. 4e8 C. e8 + e3 D. e8 - e3
Mathematics
Add or subtract. Simplify the answer.
+ 
A. 
B. 
C. 
D. 
Mathematics
Combine.15
+ 
- 
A. 13
B. 14
C. 12
D. 15
Mathematics
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Mathematics