5.
[tex]8.5 \times {10}^{ - 8} = \\ = 8.5 \times \frac{1}{{10}^{8} } = \\ = \frac{8.5}{100000000} = \\ = 0.000000085[/tex]
6.
[tex]5.19 \times {10}^{6} = \\ =5.19 \times 1000000 = \\ = 5190000[/tex]
7.not visible
8.
[tex]4.002 \times {10}^{ - 3} = \\ = 4.002 \times \frac{1}{ {10}^{3} } = \\ = \frac{4.002}{1000} = \\ = 0.004002[/tex]
