Após um vazamento de residuos tóxicos em um lago, mediu-se uma quantidade de poluentes na água no decorrer do tempo e obteve-se 60mg/litro no dia do vazamento (t=0), sendo que dia a dia a taxa
percentual de decaimentos dos poluentes é 3%.
Sendo Q a quantidade de poluentes t dias após o vazamento, obtenha Q=F(t)
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answer the questions honestly.

if you think your dog may have been exposed to a toxin, the best thing to do is to check the label of the item you think your pet ingested. read the information about toxicity. often, but not always, the information on packaging regarding children is relevant to dogs and some manufacturers even discuss dog toxicity. if there is an 800 number on the package – call them! it’s also recommended that you call your veterinarian to confirm the recommendations. if you go to your veterinarian, take all packaging and any information you have on the product.