Suppose that a = 0.5 mi, v₀ = 9 mi/h, and v_S = 3 mi/h as in Example 4, but that the velocity of the river is given by the fourth-degree function rather than the quadratic function in Eq. (18). Now find how far downstream the swimmer drifts as he crosses the river.

Example 4

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UR = Uo | 1 UD x4