Pollution is removed from a lake at a rate of f(t) kgday on day t (a) Explain the meaning of the statement f(12) 500 (b) If 15 5 f(t) dt 4000, give the units of the 5, the 15, and the 4000 (c) Give the meaning of 15 5 f(t) dt 4000

Question: Pollution is removed from a lake at a rate of f(t) kgday on day t. (a) Explain the meaning of the statement f(12) = 500.

Pollution is removed from a lake at a rate of f(t) kg∕day on day t.
(a) Explain the meaning of the statement f(12) = 500.
(b) If ∫¹⁵₅ f(t) dt = 4000, give the units of the 5, the 15, and the 4000.
(c) Give the meaning of ∫¹⁵₅ f(t) dt = 4000.

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