Solve the application and answer with a complete sentence.What is the commission from the sale of $490 worth of books, if the commission rate is 6%?
A. The commission is $34.30.
B. The commission is $24.50.
C. The commission is $294.00.
D. The commission is $29.40.
Answer: D
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Plot the relation in the xy-plane.{(10, 35), (2, -29), (40, 15), (-78, -20), (-10, 63)}
A. 
B. 
C. 
D. 
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Simplify the expression. Assume that all variables are positive when they appear.(
+ 2)(
- 2)
A. 10 - 2
B. 14
C. 8
D. 6
Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-?, -2); concave downward on (-2, ?); no inflection points B. Concave upward on (-2, ?); concave downward on (?, -2); inflection point at (-2, 2) C. Concave upward on (-?, -2); concave downward on (-2, ?); inflection point at (-2, 2) D. Concave upward on (-2, ?); concave downward on (-?, -2); no inflection points