Solve the problem.Evaluate 
Rwhere R is the interior of the ellipsoid 
. Hint: Let 
and then convert to spherical coordinates.
A. 75?2
B. 100?
C. 100?2
D. 75?
Answer: A
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Find the x- and y-intercepts. If no x-intercepts exist, state so. Round to two decimal places if necessary.y = -x2 + 6x - 2
A. x-intercepts (5.65, 0); y-intercept (0, -2) B. x-intercepts (5.65, 0) and (0.35, 0); y-intercept (0, -2) C. x-intercepts (0, 5.65) and (0, 0.35); y-intercept (-2, 0) D. No x-intercept; y-intercept (0, 2)
Find the location of the center, vertices, and foci for the hyperbola described by the equation.
- 
= 1
A. Center: (2, 1); Vertices: (2, -1) and (3, 5); Foci: (2, 2 - 
) and (3, 2 + 
)
B. Center: (2, 1); Vertices: (2, 1 - 
) and (2, 1 + 
); Foci: (2, -2) and (2, 4)
C. Center: (-2, -1); Vertices: (-2, -4) and (-2, 2); Foci: (-2, -1 - 
) and (-2, -1 + 
)
D. Center: (2, 1); Vertices: (2, -2) and (2, 4); Foci: (2, 1 - 
) and (2, 1 + 
)
Solve the problem.The revenue achieved by selling x graphing calculators is figured to be 
The cost of each calculator is 
How many graphing calculators must be sold to make a profit (revenue - cost) of at least $312.80?
A. {x?36 < x < 44} B. {x?14 < x < 26} C. {x?35 < x < 33} D. {x?34 < x < 46}
Add.
A. 5 B. 4 C. 3 D. 7 E. 2