**Answer:**

Height of wall (Perpendicular) = 11.31 ft (Approx)

**Explanation:**

**Given:**

Base Distance (Base) = 4 feet

Height of ladder (Hypotenuse) = 12 feet

**Find:**

Height of wall (Perpendicular)

**Computation:**

Perpendicular = √Hypotenuse² - Base²

Height of wall (Perpendicular) = √12² - 4²

Height of wall (Perpendicular) = √144 - 16

Height of wall (Perpendicular) = √128

**Height of wall (Perpendicular) = 11.31 ft (Approx)**

Friction has to do with this. If you have a smoother surface than another surface, the smoother surface will contain less friction. Friction is an opposing force against a moving object. If there is less opposing force towards a moving object, there is less friction. If you have a smooth road, cars won't break as fast as they would break on bumpy roads, because bumpy roads have more bumps, creating more friction. I hope that helped. :D

<h2>When Transferring Flammable Liquids - Option A</h2>

To create a pathway for the liquid to flow easily is a correct reason to physically connect objects with a bond wire when transferring flammable liquids. Physically connect the two conductive objects together with a bond wire to eliminate a difference in static charge potential among them. The bond wire is attached between the containers in the process of flammable filling liquid actions except for a metallic path is found.