math
3. Suppose a ladder is 12 ft. long. The base of the ladder is 5 ft. from a wall, and the top of the ladder is leaning against the wall. How far above the ground is the tip of the ladder?
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The tip of the ladder is 15 feet above the ground. This is because the ladder is 12 feet long, and the base of the ladder is 5 feet from the wall. Therefore, the total distance from the ground to the tip of the ladder is the length of the ladder (12 ft) plus the distance from the base of the ladder to the wall (5 ft), which is a total of 17 feet. Since the tip of the ladder is leaning against the wall, the height of the tip is 5 feet (the distance of the base away from the wall) less than the total distance of 17 feet, which is 15 feet.
