There are three models of a fraction namely area model, liner model and set model.
An eighth remains.
It is 1/8 .
Approx 1/8 will remain.
1/8 of the original amount remains.
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
The fraction or ratio of a sample possessing a certain trait is called a Proportion.
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
It tells what fraction of a radioactive sample remains after a certain length of time.
the three types of models are physical models,idea models and computer models.
mathematical models conceptual models and Physical models
The three types of models used in science are : Physical models Mathematical models Conceptual models
The Symbol p that denotes sample proportion.