Verified answer

[tex]\displaystyle\bf\\\Big(-0,2x^{3} y^{4} \Big)^{2} =\Big(-0,2\Big)^{2} \cdot x^{3\cdot 2} \cdot y^{4\cdot2} =0,04x^{6} y^{8}[/tex]

Ответ :  Г