Answer:
5.7
Step-by-step explanation:
You are faced with a right triangle, with the height of the ladder being x, 4 being a side, and 7 being the hypotenuse.
Use the formula a^2+b^2=c^2
16+x^2=49
Subtract 16 from both sides
x^2=33
x=5.74456264654
Rounds to 5.7
