Question: Solve the problem. Tides go up and down in a 12.8-hour period. The average depth of a certain river is 8 m and ranges from

Solve the problem. Tides go up and down in a 12.8-hour period. The average depth of a certain river is 8 m and ranges from 5 to 11 m. The variation can be approximated by a sine curve. Give an equation that gives the approximate variation y, if x is the number of hours after midnight and high tide occurs at 10:00 am.

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