Write four irrational number between 0.1and0.2

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.