Respuesta :

apologiabiology
I think you mean
[tex]f(t)=\sqrt{3t-9}[/tex]

so therefor since we can't take squaer root of negative

3t-9 must not be negative
basicaly, 3t-9 must be greater than or equal to 0

Greater than or equal to

I hope this helps, and God bless <3

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