In pensacola in june, high tide was at noon. the water level at high tide was 12 feet and 2 feet at low tide. assuming the next high tide is exactly 12 hours later and that the height of the water can be modeled by a cosine curve, find an equation for water level in june for pensacola as a function of time (t).
a) f(t) = 12 cospi over 2t + 5
b) f(t) = 5 cospi over 2t + 12
c) f(t) = 5 cospi over 6t + 7
d) f(t) = 7 cospi over 6t + 12