math
posted by Alexis .
a ladder rests against the top of a wall. The head of a person 3.5 feet tall just touches the ladder. The person is 3 feet from the wall and 7 feet from the foot of the ladder. What is the height of the wall?

1) The vocabulary is confusing
2) You are stupid
3) 3 + 3.5 + 7
= 13.5