1. The height of the tide in a small beach town is measured along a seawall. Water levels oscillate
between 7 feet at low tide and 15 feet at high tide. On a particular day, low tide occurred at 7:30 AM and
high tide occurred at 1:00 PM.
Write a cosine function of the form f(t) = A cos(Bt) + C, where A, B, and C are real numbers, that
models the water level, o), in feet above or below the average sea level, as a function of the time
measured in 7 hours since 7:30 AM