The percentage of the radioactive isotope left is 25.0000%.
<h3>What is the half life?</h3>
The half life of a radioactive isotope is the time that will elapse before only half of the number of original isotopes will remain.
Now;
We are told that;
Half life (t1/2) = 55 days
Time taken (t) = 115 days
Ratio of isotope remaining = N/No
Thus;
N/No = (1/2)^t/t1/2
N/No = (1/2)^115/55
N/No = (1/2)^2
N/No =1/4
Hence, the percentage = 1/4 * 100/1 = 25.0000%
Learn more about half life of an isotope:brainly.com/question/16387602
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Answer:
24p^2q^2?
Step-by-step explanation:
Not enough info, so this is what I could get...
7.B




9.A
3/2=1.5
8. F
2times pi =6.283
square root of 50= 7.071
pi squared/2= 3.289
10.H
1/7= .143
which means it can't be f or g.
Answer:
3 hours
Step-by-step explanation:
36 divided by 12 equals 3
14.4 inches / 9 = 1.6 inches
Each column is 1.6 in wide