Answer:
For the first one just multiply all of the three numbers
and the second is the same, just multiply and you'll get your answer.
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Answer:

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<u><em>System A and System B are </em></u><u><em>not equivalent</em></u> !!!
you could either multiply straight away or you could simplify right then so that you wouldn't have to it later.
20/5 * 5/2
your answer would be 10 either way
Answer:
I think that -0.0000002 is the least, but I don't know the rest. I hope you can find the rest though. Happy Holidays!
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