From the image provided, it takes 8 minutes for the fish to complete one cycle or revolution of the wheel.
What is a complete revolution?
A full cycle or revolution is a 360° angle, a full rotation, and a complete turn such that it points back in the same direction.
Approximately how long is the fish under water during each rotation?
We can see from the graphic that each step in one rotation takes one minute.
So there are three stages underwater in all. In each spin, the fish spends around 3 minutes beneath water.
What is the diameter of the Water Wheel?
Because the diameter is double the amplitude of the graph, as a result, the amplitude is four, and the diameter is eight units.
What is the equation as a cosine function for height of the fish in terms of time?
The general form of the cosine function is:
y (t) = 4Cos (πt/4) + 2
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