Answer:
11.3137085 ft
Explanation:
The length (l) of the ladder is 18ft
The height (h) of the ladder from the ground is 14 ft
The distance (x) of the foot of the ladder to the bottom of the house is:
Applying the Pythagorean theorem:
x² = l² - h²
x =

x =
= 11.3137085 ft