A radioisotope has a half-life of 7.5 hours. How many half lives have occurred after 67.5 hours?(1 point) Resp

Question

A radioisotope has a half-life of 7.5 hours. How many half lives have occurred after 67.5 hours?(1 point)
Responses

10 half-lives
10 half-lives

8 half-lives
8 half-lives

9 half-lives
9 half-lives

7 half-lives

GPT-5 mini · Answer

Number of half-lives = total time / half-life = 67.5 ÷ 7.5 = 9.

So 9 half-lives.

A radioisotope has a half-life of 7.5 hours. How many half lives have occurred after 67.5 hours?(1 point)
Responses

10 half-lives
10 half-lives

8 half-lives
8 half-lives

9 half-lives
9 half-lives

7 half-lives

All Answers 1

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A radioisotope has a half-life of 7.5 hours. How many half lives have occurred after 67.5 hours?(1 point) Responses 10 half-lives 10 half-lives 8 half-lives 8 half-lives 9 half-lives 9 half-lives 7 half-lives

All Answers 1

Submit Your Answer

A radioisotope has a half-life of 7.5 hours. How many half lives have occurred after 67.5 hours?(1 point)
Responses

10 half-lives
10 half-lives

8 half-lives
8 half-lives

9 half-lives
9 half-lives

7 half-lives