Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with vertices (0, ±9) and foci at 
.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
Mathematics
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Reverse the order of integration and then evaluate the integral.
A. 
(e81 - 1)
B. 
(e81 - 1)
C. 
e81
D. 
e81
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Find the equilibrium solutions of the equation of change 
. Round your answer to two decimal places, if necessary.
?
A. 
and 
B. 
and 
C. 
and 
D. 
and 
Mathematics
Find the limit, if it exists.
3
A. Does not exist B. 1000 C. 1331 D. ?
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Add or subtract as indicated and write the result in standard form.(6 + 7i) - (-8 + i)
A. -14 - 6i B. 14 + 6i C. -2 + 8i D. 14 - 6i
Mathematics