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Mathematics 4 Online
OpenStudy (vgonzalez):

The function f(t) = 4 cos(pi over 3t) + 15 represents the tide in Bright Sea. It has a maximum of 19 feet when time (t) is 0 and a minimum of 11 feet. The sea repeats this cycle every 6 hours. After five hours, how high is the tide? Would it be 13.5 feet 16 feet 18.5 feet 17 feet Please help me understand this problem better

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