Taking the given equation to the power of 2 we get:
[tex](\sqrt{t-13})^2=4^2.[/tex]
Simplifying the above result we get:
[tex]t-13=16.[/tex]
Adding 13 to the above equation we get:
[tex]\begin{gathered} t-13+13=16+13, \\ t=29. \end{gathered}[/tex]
Answer: t=29.
