Answer:
y = 665.7
Step-by-step explanation:
We can use the tan function in order to solve this
As tanx is Opposite over adjacent, we can set up an equation as follows
[tex]tan(31) = \frac{400}{y}[/tex]
Now we can solve for y to get the equation
[tex]y=\frac{400}{tan(31)}[/tex]
Now we can plug this into a calculator to get
y = 665.71
This would round to
y = 665.7
