the depth of the water at the end of a pier changes periodically along with the movement of tides. on a…

the depth of the water at the end of a pier changes periodically along with the movement of tides. on a particular day, low tides occur at 12:00 a.m. and 3:30 p.m., with a depth of 3.25 meters, while high tides occur at 7:45 a.m. and 11:15 p.m., with a depth of 8.75 meters. which of the following equations models d, the depth of the water in meters, as a function of time, t, in hours? let t = 0 be 12:00 a.m.\n\n$d=-3.75\\cos(\\frac{4\\pi}{31}t)+5$\n\n$d=-3.75\\cos(\\frac{4\\pi}{29}t)+5$\n\n$d=-2.75\\cos(\\frac{4\\pi}{31}t)+6$\n\n$d=-2.75\\cos(\\frac{4\\pi}{29}t)+6$

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