Question

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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.

Answer 1

answer choices-

A. d=-3.75cos(4pi/31 t)+5

B. d=-3.75cos(4pi/29 t)+5

C. d=-2.75cos(4pi/31 t)+6

D. d=-2.75cos(4pi/31 t)+6

Answer 2

@mathmale

Answer 3

@XhawaiiangirlX

Answer 4

Still there?

Answer 5

@Anaise do u know how to solve it?