Answer:

Step-by-step explanation:
in this case,
is your number. we will always note square with the tiny two at the top of the number.
Four less than anything is easily shown with a minus four.
eg. four less of 12 square:
= :)
I believe the answer is B.
13 feet
Pythagorus is used
25 + 144 = 169
169 is 13 to the second power etc