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
#SPJ1
Answer:I think the answer is letter B.
Step-by-step explanation:
Answer:
1,650 candies
Step-by-step explanation:
rate: 110 candles per minute
time: 15 minutes
rate x time = work
110 x 15 = 1650
Answer: D - 15/17
Explanation: it is the only answer that keeps continuing on forever when divided
The value of the digit is 2 because the value of the 3 is 30 (tens) and if you go one place down you are in the ones
