change that are non-motion related. 8. A navigational buoy is anchored in the intercoastal waterway to mark the channel for boat traffic. When a jet ski passes by, the buoy oscillates up and down rapidly and can be modeled by s(t) = 12 + 0.25 sin(7x) for time 0 s t S 8 seconds and s(t) is in inches. A. Find the velocity s' (t) of the buoy. V( + ) = 5 (+)' V ( +) = 12+ 0. 25 - SINTIX B. When does the buoy reach its maximum height for the first time during 0