Question

Va IMPLOR ESTE URGENT!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Răspuns:

A

md=10g

mapa=190g

ms=md+apa=10+190=200g

C=md×100/ms=10×100/190=5,26%

B

ms=150g

C=20%

md=?

mapa=?

md=C×ms/100= 20×150/100=30g

mapa=150-30=120g

C

md=30g

ms=500g

C=?

mapa=?

C=md×100/ms=30×100/500=30%

mapa=500-30=470g

D

ms=200g

mapa=150g

md=?

C=?

ms=md+apa

md=200-150=50g

C=md×100/ms=50×100/200=25%

Explicație: