The mass of iron in planet Earth is 2.090 x 1024 kg. Given that the Earth has a mass of 5.972 x 1024 kg, find the
percentage of the Earth's mass that is iron.

Quickly! linda had an orange ribbon and a blue ribbon.the orange ribbon was 2 meters long.the blue ribbon was 4/5 as long as the orange ribbon.linda cut off a piece of blue ribbon. the length of the piece was 25% of the length of the blue ribbon. a) what was the length of the blue ribbon before it was cut. b) find the length of the piece of blue ribbon that linda cut off.