Find all relative extrema for the function, and then match the equation to its graph.
z = -2x3 - 3y4 + 6xy2 + 
A. Relative minima of - 
at (1, 1) and at (1, -1)
B. Relative maxima of 
at (1, 1) and at (1, -1)
C. Relative maxima of 
at (1, -1) and at (-1, 1);
saddle point at (0, 0)
D. Saddle points at (0, 0), (-1, 1), (1, -1), (1, 1),
and (-1, -1)
Answer: B
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A. 2.3 m B. 7.1 m C. 0.1 m D. 226.7 m
Find the logarithm using the change-of-base formula.log100 30
A. 0.7386 B. 3.4012 C. 4.6052 D. 1.354
Simplify the expression. Assume that all variables are positive when they appear.
A. 8y4 
B. 8x3y4 
C. 8x7y8 
D. 8x3y4 
Match the situation to the graph that models it best.The approximate distance that the moon is from earth at time x
A. 
B. 
C. 
D. 