Use the graph to determine the equation of the ellipse.
A. 4x2 + 8y2 = 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 16x2 + 64y2 = 1
Answer: B
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Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?
A. $300,000 B. $360,000 C. $60,000 D. $218,400
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find cos(2?).
A. 
B. 
C. - 
D. - 
Use the vectors u, v, and w in the accompanying figure to graph the vector. 
3w
A. 
B. 
C. 
D. 
Find all relative extrema for the function, and then match the equation to its graph.
z = -y4 + 4xy - 2x2 + 
A. Relative minima of - 
at (0, 1) and
at (0, -1); saddle point at (0, 0)
B. Saddle points at (0, 0), (-1, 1), (1, -1), (1, 1),
and (-1, -1)
C. Relative maxima of 
at (1, -1)
and at (1, 1);
D. Relative maxima of 
at (1, 1)
and at (-1, -1); saddle point at (0, 0)