the half life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. starting with 165 grams of radioactive isotope how much will be left after 4 half lives.
Answers
Dividing the weight of the radioactive isotope from 4 halves that is 16, the left weight of the radioactive isotope after 4 half-lives is
⇒ 10.3 grams
Given that,
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass.
Here, Starting weight of the radioactive isotope is, 165 grams
Hence, the left weight of the radioactive isotope after 4 half-lives is,
⇒
⇒
⇒ 10.3 grams
To learn more about the divide visit:
$SPJ4
82.5/2=41.25
41.25/2=20.625
20.625/2=10.3125
The answer is 10.3125
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Answer:
The correct answer is option C. 86°
Step-by-step explanation:
From the figure we can see a circle.
To find the measure of <PRQ
Consider the triangle PQR,
<PRQ = <PTR + <RPT
From the figure we get,
<PTR = 102/2 = 51
<RPT = 70/2 = 35
<PRQ = <PTR + <RPT
51 + 35 = 86°
Therefore the correct answer is option C. 86°
Answer:
It makes sense for the answer to be 86 degrees since it's almost a right angle.
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Step-by-step explanation:
The Lateral surface area is the surface area of only 4 sides of the figure, that is, area excluding top and bottoms sides.
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Answer:
1/0.04 = 25
Step-by-step explanation:
Answer:
Step-by-step explanation:
well 1/4% wouldnt be 25% because they are 25% = 0.25 = 1/4
the percentage sign changes everything
since it is 1/4% rather than 1/4 by itself
1/4% = 0.25%
if you want to know the percent as a decimal you move the "." to the left twice
(or divide by 100)
so that means that the decimal of 0.25% would be 0.0025
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Step-by-step explanation:
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8n + 5n = 13n