SOLUTION
Given:
How to write -4.38x10^5 and 8.142x10^-3 in standard form.
[tex]\begin{gathered} For\text{ -4.38}\times10^5,\text{ the standard form is:} \\ -4.38\times100000=-438000 \\ \end{gathered}[/tex][tex]\begin{gathered} For\text{ 8.142}\times10^{-3},\text{ the standard form is:} \\ 8.142\times0.001=0.008142 \end{gathered}[/tex]
Final answer:
[tex]\begin{gathered} -4.38\times10^5\Rightarrow-438000 \\ 8.142\times10^{-3}\Rightarrow0.008142 \end{gathered}[/tex]