Salinas Joseph
06/08/2023 · High School

8 (U.E. Londrina-PR) A espessura da camada de creme formada sobre um café expresso na xícara, servido na cafeteria \( A \), no decorrer do tempo, é descrita pela função \( E(t)=\mathrm{a} \cdot 2^{\text {bt }} \), onde \( t \geqslant 0 \) é o tempo (em se- gundos) e a e b são números reais. Sabendo que inicialmente a espessura do creme é de 6 milímetros e que, depois de 5 segundos, se reduziu em \( 50 \% \), qual a espessura depois de 10 segundos? Apresente os cálculos realizados na resolução da questāo.

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A espessura do creme após 10 segundos é de 1,5 milímetros.

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