Solve.A carpenter wants to cut the largest possible ellipse from a 9 ft by 11 ft rectangular board. After the foci are located, a string is connected to them and pulled taut by a pencil in order to draw the ellipse. Find the length of the string.
A. 9 ft
B. 18 ft
C. 11 ft
D. 22 ft
Answer: C
Mathematics
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? 
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