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A Parabolic Arch Spans a Stream 220 Feet Wide

Question 20

Multiple Choice

A parabolic arch spans a stream 220 feet wide. How high above the stream must the arch be to give a minimum clearance of 20 feet over a channel in the center that is 180 feet wide?


A) 20 feet
B) 31.325 feet
C) 60.5 feet
D) 80.5 feet
E) 34.725 feet

Correct Answer:

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