Answer:
C
Explanation:
If you are pulling off the side of the road, first turn on your signal so people behind you will know. Once you are off the road turn on your hazards. so traffic will see that there is someone in the vehicel and they should slow down a proceed with caution.
Answer:
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If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
