Answer:

Step-by-step explanation:
The given functions are:

and

Now,


The domain refers to values of
for which
is defined.
The expression under the radical sign must not be negative.
The domain is

This answer is B because it’s negative and less thsn
Nina's rate is 12.7 mph and Sophia's rate is 10 mph. Therefore, Nina is faster.
I did the math,This is false.
Hope this helps.