Answer:
1. 4.2 x 10^-7
2. 2.9 x 10^-6
3. 7.1 x 10^-2
4. 2.56 x 10^5
least to greatest
4.2 * 10^-7
2.9*10^-6
7.1 * 10^-2
2.56 * 10^5
Step-by-step explanation:
2.56 * 10^5 =256000
4.2 * 10^-7 =0.00000042
7.1 * 10^-2 =0.071
2.9*10^-6 = 0.0000029
