Respuesta:
3.9 × 10⁴ = 39000
2 × 10⁻⁵ = 0.000019999999999999998
6.42 × 10⁸ = 642000000
5 × 10⁻⁹ = 0.000000005
1.092 × 10¹¹ = 109200000000.00002
8.43 × 10⁻² = 0.0843
7 × 10⁶ = 7000000
9.521 × 10⁻⁴ = 0.0009521
4.03 × 10⁷ = 40300000
3.6 × 10⁻¹ = 0.36000000000000004
