For this case, we must indicate which of the given functions is not defined for
By definition, we know that:
has a domain from 0 to infinity.
Adding or removing numbers to the variable within the root implies a translation of the function vertically or horizontally. For it to be defined, the term within the root must be positive.
Thus, we observe that:
is not defined, the term inside the root is negative when
.
While
if it is defined for 
, your domain is given by all real numbers.
Adding or removing numbers to the variable within the root implies a translation of the function vertically or horizontally. In the same way, its domain will be given by the real numbers, independently of the sign of the term inside the root.
So, we have:
with x = 0:
is defined.
with x = 0:
in the same way is defined.
Answer:

Option b
Answer: False
Step-by-step explanation:
Studies by economists have found that a 10 percent increase in the minimum wage decreases teenage employment 1-3 percent not 10 percent. So it is false.
Answer:
1. Proportional to Mikel's tip.
2. Not proportional to Mikel's tip.
3. Proportional to Mikel's tip.
Step-by-step explanation:
We are told that Mikel gave a $1.32 tip for an order that cost $8.80. We are asked to determine whether or not each given tip is proportional to Mikel's tip.
Let us compare our given tip and order cost proportions with Mikel given tip and order cost proportion.
1.

We can see that our given proportion is equal to Mikel's proportion, therefore, tip given in first option is proportional to Mikel's tip.
2.
We can see that tip given in second option is greater than Mikel's tip, therefore, it is not proportional to Mikel's tip.
3. 
We can see that our both proportions are equal, therefore, tip given in third option is proportional to Mikel's tip.