Answer :
[tex]x=39ft[/tex]
1) We can convert this measurement by setting a proportion and cross multiplying that.
2) So, let's begin by writing the proportions:
[tex]\begin{gathered} 1yd-----3ft \\ 13-----x \\ \frac{1}{13}=\frac{3}{x} \\ x=39\:ft \end{gathered}[/tex]So 13 yds are equivalent to 39 feet.