If the total income generated from gasoline for aer was 408 million.

Frequency is the number of complete oscillations of a wave per second.

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.

One of the angles would be 70 degrees and the other one would be 90 degrees