ANSWER
Brayden should have expanded the parenthesis first.
EXPLANATION
The expression Brayden is trying to simplify is

To simplify this expression, the first thing to do is to expand the perfect square to obtain:

We can now distribute the negative to the terms in the parenthesis.

Answer:
(.4) ^3
Step-by-step explanation:
0.4. X 0.4 x 0.4
We are multiplying 3 of the number .4 's together
The number 3 is the exponent
(.4) ^3
The answer is X=3 or x=5/3
The answer is 10. because median means middle so 10 is the middle #.