The function
gives the number of the original trout alive after x years. When the number of the original trout alive is 300, then
![300=1500e^{-0.4x}](https://tex.z-dn.net/?f=300%3D1500e%5E%7B-0.4x%7D)
Solve this equation:
![e^{-0.4x}=\dfrac{300}{1500},\\ \\e^{-0.4x}=\dfrac{1}{5},\\ \\-0.4x=\ln \dfrac{1}{5},\\ \\x=\dfrac{\ln \dfrac{1}{5}}{-0.4}\approx 4.024.](https://tex.z-dn.net/?f=e%5E%7B-0.4x%7D%3D%5Cdfrac%7B300%7D%7B1500%7D%2C%5C%5C%20%5C%5Ce%5E%7B-0.4x%7D%3D%5Cdfrac%7B1%7D%7B5%7D%2C%5C%5C%20%5C%5C-0.4x%3D%5Cln%20%5Cdfrac%7B1%7D%7B5%7D%2C%5C%5C%20%5C%5Cx%3D%5Cdfrac%7B%5Cln%20%5Cdfrac%7B1%7D%7B5%7D%7D%7B-0.4%7D%5Capprox%204.024.)
Answer: after 4.024 year (or 5 year if round to the whole number of years)
The eight pound bag of dog food is better.
Dont click the link the bot sent you they can hack you
Answer:$8.60
I put the work into the picture. Hope this helps!
17.05 I think..
this could be it idrk what it is