Respuesta :

If i read it right it would be 4*10^2
[tex](2.888\cdot10^5):(7.22\cdot10^2)=(2.888:7.22)\cdot(10^5:10^2)=0.4\cdot10^{5-2}\\\\=0.4\cdot10^3=\boxed{4\cdot10^2}=\boxed{400}[/tex]
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