Concept explainers
Ocean Tide The tide, or depth of the ocean near the shore, changes throughout the day. The water depth
where t represents the time in hours, with
(a) Algebraically find the times at which the high and low tides occur.
(b) If possible, algebraically find the time (s) at which the water depth is
(c) Use a graphing utility to verify your results from parts (a) and (b).
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