Question: please help Enter your answer in the provided box. A biochemist stedying breakdown of the insecticide DDT finds that it decomposes by a first-order reaction

please help

Enter your answer in the provided box. A biochemist stedying breakdown of the insecticide DDT finds that it decomposes by a first-order reaction with a half life of 12.0y. How long does it take DDT in a soil sample to decompose from 701 ppbm to 10.0ppbm (parts per billion by mass)

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