To arrange the numbers in descending order, we can consider the scientific notation and the values they represent:
- \( 2.3 \times 10^{-8} \) is equal to \( 0.000000023 \)
- \( 2.3 \times 10^{-10} \) is equal to \( 0.00000000023 \)
- \( 3.2 \times 10^{-10} \) is equal to \( 0.00000000032 \)
- \( 2.3 \times 10^{-12} \) is equal to \( 0.0000000000023 \)
Now we can arrange them in descending order based on their values:
- \( 2.3 \times 10^{-8} \)
- \( 3.2 \times 10^{-10} \)
- \( 2.3 \times 10^{-10} \)
- \( 2.3 \times 10^{-12} \)
So the ordered list in descending order is:
\( 2.3 \times 10^{-8}, 3.2 \times 10^{-10}, 2.3 \times 10^{-10}, 2.3 \times 10^{-12} \)