Determine where the given function is concave up and where it is concave down. f(x) = (x + 3)2/3 - 5
A. Concave down on (-?, -3), concave up on (-3, ?)
B. Concave down on (-?, ?)
C. Concave up on (-?, -3) and (-3, ?)
D. Concave down on (-?, -3) and (-3, ?)
Answer: D
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Tell whether the statement is true or false.Let A = {2, 3, 4, 5, 6, 7}, B = {4, 6, 8}, C = {2, 3, 5, 7}, D = {2, 7}, and 
{6, 8} ? B
A. True B. False
Simplify the expression. Assume all variables represent positive real numbers.
A. 4x
B. 4x
C. 4x
D. x
Select the graph of the polar equation using symmetry, zeros, maximum r-values, and any
other additional points.
?
?
A. Symmetric with respect to 
?
B. Symmetric with respect to
?
C. Symmetric with respect to
?
D. Symmetric with respect to
?
E. Symmetric with respect to
?
Find the focus and the directrix of the parabola.(x + 5)2 = -32(y - 4)
A. Focus: (-13, -4); directrix: y = 12 B. Focus: (-5, -4); directrix: x = 12 C. Focus: (-5, 12); directrix: y = -4 D. Focus: (-5, -4); directrix: y = 12