Question

i need the explaination and the answer. thank u

Answer 1

Step-by-step explanation:

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

First half-life:

432 years.

$1 \div 2 = 0.50$

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

Second half-life:

$432 \times 2 = 864$

$0.5 \div 2 = 0.25$

0.25 (1/4) of the americium remains.

Third half-life:

$432 \times 3 = 1296$

$0.25 \div 2 = 0.125$

0.125 (1/8) of the americium remains.

Last half-life:

$432 \times 4 = 1728$

$0.125 \div 2 = 0.0625$

0.0625 (1/16) of the americium remains.

Option B is correct.