Answer:
[tex]d = \sqrt{122} \: in[/tex]
Step-by-step explanation:
D^2 = x^2 + y^2 + z^2
= (9 in)^2 + (5 in)^2 + (4 in)^2
= 122 in^2
or
[tex]d = \sqrt{122} [/tex]
