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.

What situation is an example of an observational study

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?