Answer:
I believe that the answer is C
B becuase you can insert 5 in the rule and get 45 as an output
The index of radical expression is the number indicating which root (square root, cube root, etc.) is meant.
If there's no index on the radical expression, then it's assumed to be square root.
Janet is 23, julie is 20, and their brother is 12. 23+20+12=55
Answer:

Step-by-step explanation:

Applying exponent rule : 
