a)ms=500g
md=150g
c/100=md/ms
c/100=150/500
c=100×150/500
c=150/5
c=30%
b)md=500g
mapa=2kg=2000g
ms=md+mapa
ms=2000+500
ms=2500
c/100=md/ms
c/100=500/2500
c=100×500/2500
c=500/25
c=20%
c)md=80
densitatea=m/V=>m=densitatea×V
m=1,3075×153
m=200(rotunjit,normal da 200,0475)
c/100=md/ms
c/100=80/200
c=100×80/200
c=80/2
c=40%
Sper ca te-am ajutat!
