Answer:
15 feet high
Step-by-step explanation:
Sheila - 4 feet off the ground, 3 feet horizontally form the base of the ladder.
ladder - 15 feet from the wall.
4 : 3 = x : 15
4x15 = 4x
60 = 4x
60/4 = 4x/4
/4
15 = x
The top of the ladder is 15 feet high.