Pollution levels in Lake Erie have been modeled by the equation , where x is the volume of pollutants (in cubic kilometers) and t is the time (in years) (Adapted from R. H. Rainey, Science 155 (1967), 1242-1243). Find the initial pollution level; that is, find x when . A)0.23 km³ B)0.1 km³ C)0.40 km³ D)0.20 km³ E)0.7 km³

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The Answer of Pollution levels in Lake Erie have been modeled by the equation , where x is the volume of pollutants (in cubic kilometers) and t is the time (in years) (Adapted from R. H. Rainey, Science 155 (1967), 1242-1243). Find the initial pollution level; that is, find x when . A)0.23 km³ B)0.1 km³ C)0.40 km³ D)0.20 km³ E)0.7 km³

Pollution Levels in Lake Erie Have Been Modeled by the Equation