Answer:
5 000 000 cm
Step-by-step explanation:
1km = 1000 m (meter)
1m = 100 cm
then
1km = 1000×100 cm
= 100 000
50km = 50×100 000
= 5 000 000
5,000,000 cm
1 km=100000cm
we just multiply 50km x 100000,which we get 5 million cm
15,000
20% of 15,000 is 3,000. 15,000-3,000=12,000
C, D