Mathematics, 08.12.2019 02:31, skatelife8974

In a lake, one-fourth of the water is replaced by clean water each year. sixteen thousand cubic meters of soluble toxic chemical spill takes place in the lake. let t (n) represent the amount of toxin left after n years.
b. how much toxin will be left after 12 years?
c. when will 80% of the toxin be eliminated?

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In a lake, one-fourth of the water is replaced by clean water each year. sixteen thousand cubic mete...