The function f(t) = 5 cos(pi over 6t) + 7 represents the tide in stanley sea. it has a maximum of 12 feet when time (t) is 0 and a minimum of 2 feet. the sea repeats this cycle every 12 hours. after four hours, how high is the tide?

11.3 feet

9.5 feet

4.5 feet

2.6 feet

the answer to this question would be 4.5

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )