A car radiator has a 16-quart capacity and is currently filled with a 40% antifreeze solution. How many quarts of this solution should be drained off and replaced with 100% antifreeze so that the radiator is filled with a 50% antifreeze solution? express your answer as a common fraction.

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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.