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Krypton-79 has a half life of 35 hours. How many half lives have passed after 70 hours? a.1 b.2 c.3 d.4

Krypton-79 has a half life of 35 hours. How many half lives have passed after 70 hours? a.1 b.2 c.3 d.4
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1 vote
Krypton-79 has a half life of 35 hours. How many half lives have passed after 70 hours?

a.1
b.2
c.3
d.4

asked
User Li
by
7.9k points

2 Answers

6 votes
3 is the answer because it’s obvious
answered
User Kenial
by
8.7k points
4 votes

Answer: b.2

Step-by-step explanation:

answered
User Kieren Johnstone
by
8.1k points
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