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A swimming pool is being drained so it can be cleaned. The amount of water in the pool is changing according to the function f(t) = 80,000 - 16,000t, where t represents the time in hours and f(t) represents the amount of water in liters. What is the domain of the function? A {t| 0 s ts 80,000 } B all non-negative real numbers C all real numbers D {t| Osts 5}