Answer:
On a calculator you would get 120.008264463
other wise know as 120 1/121
Given that,

To find,
The domain of f(x).
Solution,
We have, 
To find domain,
The term under the square root must be positive or null as follows :

Adding 3 both sides

So, the domain is x-3>0
.
Step-by-step explanation:
here is the graph step by step to tell you the interval over which f x is increasing