The anser is that what i think
The inequality that represents the domain of the function is 
<h3>How to determine the domain?</h3>
The function is given as:

Set the radicand greater than or equal to 0

Multiply through by 2
x - 20 ≥ 0
Add 20 to both sides
x ≥ 20
Hence, the domain of the function is x ≥ 20
Read more about domain at:
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Y int = (0,3)
x int = (-5,0)
Well it is b I’m 80% sure
2 x (5-2)^3
2 x (3)^3
2 x 27
54