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A cross-section of an irrigation canal is a parabola. If the surface of the water is 49ft wide and the canal is 13ft deep at

A cross-section of an irrigation canal is a parabola. If the surface of the water is 49ft wide and the canal is 13ft deep at the center, how deep is it 15 ft from the edge?

A. 6.7 ft

B. 2 ft

C. 6.3 ft

D. 11 ft

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