[tex]A) \ 628 \ 000 \ km = 628 \ 000 \ 000 \ m = 6,28\cdot10^{8} \ m\\\\\\B) \ 32h \ 21min = 32\cdot3600 \ s + 21\cdot60 \ s = 115 200 \ s +1260 \ s =116460 \ s =\\\\=1,1646\cdot10^5} \ s[/tex]
[tex]C) \ 2t \ 200kg = 2000 \ kg + 200 \ kg = 2200 \ kg = 2,2\cdot10^{3} \ kg[/tex]
[tex]D) \ 20\frac{km}{h} = 20\cdot\frac{1000 \ m}{3600 \ s} = 5,(5)\frac{m}{s} \approx 5,56\frac{m}{s}[/tex]
