SOLUTION: A radioactive chemical element has a half life. This means that after a specific length of time, the amount of the radioactive material decreases by half. After each half life, the

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Question 964483: A radioactive chemical element has a half life. This means that after a specific length of time, the amount of the radioactive material decreases by half. After each half life, the radioactive material again decreases by half. The initial amount of the element is 80 grams.
If T represents the number of half lives that have passed, write the equation that can be used to determine the amount of radioactive material, R, after t half lives.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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A radioactive chemical element has a half life.
This means that after a specific length of time, the amount of the radioactive material decreases by half.
After each half life, the radioactive material again decreases by half.
The initial amount of the element is 80 grams.
If T represents the number of half lives that have passed, write the equation that can be used to determine the amount of radioactive material, R, after t half lives.
A = remaining about after t half-lives
A = R%2A%281%2F2%29%5Et
We can graph this using R=80, x=t, y = amt remaining
y = 80%2A%281%2F2%29%5Ex
+graph%28+300%2C+200%2C+-2%2C+6%2C+-20%2C+90%2C+80%2A%281%2F2%29%5Ex%2C+10%29+
Green line represents amt after 3 half lives y=10