To arrange the numbers \(2.3 \times 10^{-10}\), \(3.2 \times 10^{-10}\), \(2.3 \times 10^{-12}\), and \(2.3 \times 10^{-8}\) in descending order, we can compare their coefficients along with their powers of ten:
- \(2.3 \times 10^{-8}\) (largest, because \(-8\) is greater than the others)
- \(3.2 \times 10^{-10}\) (next, since \(-10\) is greater than \(-12\))
- \(2.3 \times 10^{-10}\) (next, same power as \(3.2 \times 10^{-10}\) but smaller coefficient)
- \(2.3 \times 10^{-12}\) (smallest, with the lowest power)
So the numbers in descending order are:
- \(2.3 \times 10^{-8}\)
- \(3.2 \times 10^{-10}\)
- \(2.3 \times 10^{-10}\)
- \(2.3 \times 10^{-12}\)