Solve the problem.A rectangular board is 13 by 16. The foci of an ellipse are located to produce the largest area. A string is connected to the foci and pulled taut by a pencil in order to draw the ellipse. Find the length of the string.
A. 32
B. 16
C. 13
D. 26
Answer: B
Mathematics
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A. 5, - 1 B. 5, 1 C. - 5, - 1 D. 5, 0
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A. 
B. 
C. 
D. 
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A. 0 B. 1 C. 720 D. 6
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