The formula that relates the length of a ladder, l, that leans against a wall with distance d from the base of the wall and the height h that the ladder reaches up the wall is l = startroot d squared + h squared endroot. What height on the wall will a 15-foot ladder reach if it is placed 3. 5 feet from the base of a wall? 11. 5 feet 13. 1 feet 14. 6 feet 15. 4 feet.

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Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.