Answer:
Option A. [tex]10\ ft[/tex]
Step-by-step explanation:
Let
x-----> the length of the ribbon
we know that
Applying the Pythagoras Theorem, find the length of the diagonal of the rectangle
so
[tex]x^{2}=8^{2}+6^{2}[/tex]
[tex]x^{2}=64+36[/tex]
[tex]x^{2}=100[/tex]
[tex]x=10\ ft[/tex]