Solve the Problem $40 \mathrm { ft }$ Wide and the Canal Is

question 162

Multiple Choice

Solve the problem.
-A cross-section of an irrigation canal is a parabola. If the surface of the water is $40 \mathrm { ft }$ wide and the canal is $7 \mathrm { ft }$ deep at the center, how deep is it $10 \mathrm { ft }$ from the edge?

• A) \(1.8 \mathrm { ft }\)
• B) \(3.1 \mathrm { ft }\)
• C) \(3.9 \mathrm { ft }\)
• D) \(5.2 \mathrm { ft }\)

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