I'm on the LAST Question if i mess up, im done. Please Help and you'll be awarded 20 points

Given:
[tex] \frac{64}{81}=d^2 [/tex]
All of the items are perfect squares, so we can take the square root of both sides easily:
[tex]\sqrt{\frac{64}{81}}=\sqrt{d^2}[/tex]
Simplify.
[tex] \frac{8}{9}=d[/tex]
OR
[tex] -\frac{8}{9}=d[/tex]