Answer:

Explanation:
Given

Required
Determine the domain
The domain, in this case means the possible values of x
From the question, we understand that x represents minutes
Since it's impossible to have a negative minutes, then x starts at 0
i.e.
or

Also, from the question, we understand that the time can not be more than 3 minutes
i.e.

Now, we have two inequalities:
and

Which can be written as:

Hence, the domain is:
