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? remaining amount = ?(1 - )^ remaining amount = i(1 - r)^t enter the number that belongs in the green box.
Answer
Explanation:
Step1: Identify the initial - amount
The initial amount $I$ of the radioactive substance is 40 grams. This is the value that goes in the green - box in the formula $Remaining\ Amount = I(1 - r)^t$.
Step2: Identify the decay factor
The half - life of the substance is 1 year. In 1 year, half of the substance decays, so the decay rate $r=\frac{1}{2}=0.5$.
Step3: Identify the time
The time $t = 3$ years.
Answer:
40