Final answer:
The change in velocity of the fish is found by multiplying the acceleration (9.8 m/s²) by the time (1899 seconds), resulting in 18,612.2 m/s, with the closest provided option being 18,641 m/s.
Step-by-step explanation:
When calculating the change in velocity of a fish that experiences an acceleration of 9.8 m/s² over a period of 1899 seconds, we use the formula final velocity - initial velocity = acceleration × time. Since the initial velocity is not provided, we can assume it to be zero, and thus the change in velocity is simply acceleration × time. The calculation would then be 9.8 m/s² × 1899 s, which equals 18,612.2 m/s. However, looking at the provided options, the closest value is 18,641 m/s, which suggests a potential rounding in the options or the question.