\[\boxed{\mathbf{811\ (811)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ A(0,4);\ \ C(1,1);\ \ F(1,9);\ \ \]
\[B(0,8);\ \ D(1,7);\ \ E(2,2).\]
\[2)\ M(5,9);\ \ K(6,6);\ \ R(7,7);\ \ \]
\[N(6,3);\ \ P(7,2);\ \ S(8,4).\]
\[\boxed{\ \mathbf{811}.\ }\]
\[30 \cdot 20 \cdot 25 - 15 \cdot 20 \cdot 5 =\]
\[= 15\ 000 - 1500 = 13\ 500\ см^{3}.\]
\[Ответ:13\ 500\ см^{3}.\]