Answer
$$ y=3.4e^{-5t}.$$
Work Step by Step
The solution of the differential equation is given by
$$ y=Ce^{-5t}.$$
To find $ C $, we use the initial condition $ y(0)=3.4$. Then we have $ C=3.4$.
Hence the solution is
$$ y=3.4e^{-5t}.$$
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