Question

matematica funcao exponencial, Pvrrr

Answer 1

Explicação passo-a-passo:

Vou considerar o x sendo uma multiplicação

$$\begin{lgathered}T = 160.2^{-0,8.t}+25\\\\65=160.2^{-0,8t}+25\\\\40=160.2^{-0.8t}\\\\\frac{40}{160}=2^{-0,8t}\\\\\frac{1}{4}=2^{-0,8t}\\\\4^{-1}=2^{-0,8t}\\\\(2^2)^{-1}=2^{-0.8t}\\\\2^{-2}=2^{-0,8t}\\\\-2=-0,8t\\\\t=\frac{-2}{-0,8}\\\\t=2,5\end{lgathered}$$

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