х=-4
х=-7
х=-25
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(2*10^2)^3*3*10^(-5)=2^3*10^6:10^5=240
1/3+1/2=5/6. 1:5/6=6/5=1,2. 1 час 12 минут
V=1/3πR²h 1л=0,001м³=1000см³
1/3*3,14*R²*15=1000
15,7R²=1000
R²=1000:15,7≈63,69
R≈7,8см