Solve the system by the Gauss-Jordan method.
?
?
A. 
B. ?
C. ?
D. ?
E. inconsistent
Answer: C
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Find the derivative.y = 
+ 
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
+ 
What is the surface area of the rectangular prism shown below?
Graph the function.h(x) = x2 + 1
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. 29.7%; $467 million B. 31.4%; $464 million C. 28.1%; $470 million D. 26.5%; $469 million