Answer
The order is 1.
It is nonlinear.
Work Step by Step
The differential equation $$\frac{dy}{dt}+ty^2=0$$ has order 1 because the highest derivative appearing in the equation, $\frac{dy}{dt}$, is of order 1.
It is nonlinear because the function $y$ is raised to the second power in the term $ty^2$.
