Answer:yes it is because it is a number with radical
Step-by-step explanation:
Unless some obnoxious mod deletes this, the answer is 84
To find it, you perform these steps:
7*12 (since there are 12 inches per foot, an 7 feet)
84
Your answer is 84 inches.
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
.