Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (0, 
) and (0, -
)
B. foci at (
, 0) and (-
, 0)
C. foci at (5, 0) and (-5, 0)
D. foci at (4, 0) and (-4, 0)
Answer: B
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. Find the Fahrenheit temperatures at which the reaction will remain stable. 
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