the half - life of a particular radioactive substance is 1 year. if you started with 40 grams of this…

the half - life of a particular radioactive substance is 1 year. if you started with 40 grams of this substance, how much of it would remain after 3 years?\nremaining amount = 40(1 - ?)\nremaining amount = i(1 - r)^t\nenter the number that belongs in the green box.

the half - life of a particular radioactive substance is 1 year. if you started with 40 grams of this substance, how much of it would remain after 3 years?\nremaining amount = 40(1 - ?)\nremaining amount = i(1 - r)^t\nenter the number that belongs in the green box.

Answer

Explanation:

Step1: Understand the half - life concept

The amount of a radioactive substance reduces by half in each half - life period. So the rate of decay $r=\frac{1}{2}=0.5$.

Step2: Identify the formula variable

In the formula $Remaining\ Amount = I(1 - r)^t$, the value in the green box represents the rate of decay $r$.

Answer:

$0.5$