Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 3 ; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0)
B. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (-?, -3) and (3, ?); concave up on (-3, 3)
C. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0)
D. Local minimum at x = 3 ; local maximum at x = -3 ; concave up on (-?, -3) and (3, ?); concave down on (-3, 3)
Answer: A
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Combine the following, if possible.
+ 5
+ 4
A. 47
B. 47
C. 9
D. 9
Solve the problem.The difference between the tuition at State University and Highbrow College is less than $900. The tuition at Highbrow is $5000. Express this as an absolute value inequality. Use "x" for the tuition of State University.
A. x < 
B. 
< 5000
C. x > 5000 - 
D. 
< 900
Multiply or divide as indicated.(-2) ? (-5) ? (-6) ? (-9) ? (-10)
A. 5400 B. -32 C. -5400 D. 32
Find the indicated function.The height of a box is 7 inches. The length is three inches more than the width. If x represents the width, what is the function to represent the volume?
A. V(x) = 4(3 - x) B. V(x) = 7x(x - 3) C. V(x) = 4(x + 3) D. V(x) = 7x(x + 3)