Respuesta :

Step-by-step explanation:

2. 7x10^5

3. 5x10^3+3x10^2

4. 4x10^5+7x10^4

5. 9x10^6+5x10^5

6. 3 x10^-4

7. 7x10^-5

8. 4 x 10^-4+ 5x10^-5

9. 3 ×10^-3+ 4x10^-4

10. 7x10^-4+ 2x10^-5+ 4×10^-6