Which of the following best represents A↓ A R R=A-B? B R B at R

Q: how did you get n=3?

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A: Given: a→=6i^+6j^+6k^ and  b→=4i^+7j^+9k^

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A: position coordinates:a: 0,10,0F:12,10,0c:0,0,15g0,0,15e12,0,0

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.