Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with intercepts (±5, 0) and (0, ±6)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
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A. x
B. 
C. -x
D. 2x
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A. x6 B. (2x)8 C. x8 D. (2x)6
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A certain firm's marginal cost, in dollars, for a product is 
, its marginal revenue, in dollars, is 
, and its total cost of production of 8 items is $900. Find the profit or loss at the
optimal level of production. Round your answer to the nearest dollar. ? A. $172 loss B. $172 profit C. $820 profit D. $820 loss E. $400 loss
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A. 81 in.2 B. 162 in.2 C. 27 in.2 D. 324 in.2
Mathematics