Question

I need the explaination and the answer. thank u

Answer 1

Explanation:

The americium is represented as 1. Every 432 years it decreases by 50%.

First half-life:

432 years.

`1 / 2 = 0.50`

0.50 (1/2) of americium remains after 432 years.

Second half-life:

`432 * 2 = 864`

`0.5 / 2 = 0.25`

0.25 (1/4) of the americium remains.

Third half-life:

`432 * 3 = 1296`

`0.25 / 2 = 0.125`

0.125 (1/8) of the americium remains.

Last half-life:

`432 * 4 = 1728`

`0.125 / 2 = 0.0625`

0.0625 (1/16) of the americium remains.

Option B is correct.