Solve the problem.How many different two-digit numbers can you form using the digits 1, 2, 3, 5, 6, 7, and 9 with repetition allowed?
A. 49
B. 26
C. 36
D. 42
Answer: A
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Find the area of a triangular window with the given base and height.Base = 7.4 ft, height = 5 ft
A. 12.4 sq ft B. 37 sq ft C. 6.2 sq ft D. 18.5 sq ft
Fill in the blank with the correct inequality symbol.If - 3x < 12, then x 
-4.
A. < B. ? C. > D. ?
Match the given equation with one of the graphs.x2 = -5y
A. 
B. 
C. 
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. 35.8%; $276 million B. 41.2%; $264 million C. 34.0%; $271 million D. 36.6%; $268 million