Lewis Peters
01/18/2024 · Elementary School

Um cientista mediu que a quantidade inicial de carbono-14 em uma substância era igual a 25 gramas. A relaçäo entre \( A \), a quantidade de carbono-14 restante nessa substáncia, em gramas, e \( t \), o tempo decorrido em anos desde a mediçāo inicial, é modelada pela equaçâo a seguir. \( A=25 e^{-0,00012 t} \) Em quantos anos a substância terá exatamente 20 gramas(g) de carbono- 14 ?

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A substância terá 20 gramas de carbono-14 em cerca de 1860 anos.

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