Tungsten, W-181 is a radioactive isotope with a half life of 121 days. If a medical lab purchase 24 kg of W-181 how much will be
left after 1 year?
2 answers:
Answer:
2.97 kg.
Step-by-step explanation:
We have been given that Tungsten, W-181 is a radioactive isotope with a half life of 121 days.
We will use half-life formula to solve our given problem.
, where,
A = Final amount.
a = Initial amount,
t = Time,
h = Half life.
Upon substituting our given values in above formula we will get,



Therefore, 2.97 kg of W-181 will be left after 1 year.
3 kg because one year is approximately 3 half-lives of W-181. The amount remaining would be 1/23<span> or 1/8. That is 3 kg of W-181.</span>
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989.75060139
100.023424234 divided by 10.32342 = 9.68898138737
9.68898138737 + 1000.293920 = 1009.98290139
1009.98290139 - 20.2323 = 989.75060139
1200 * 0.05 * 4 = 240$ the amount of interest after 4 years.
total 1200+240=1440$
Hii :))

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We'll start with the expression for the quotient of
and
, which means we'll use division:

Now we find
less than that, meaning we'll use subtraction:
