Answer:2.2
Step-by-step explanation:100.8-98.6=2.2
An irrational number/value is one you cannot express in terms of a ration, or a fraction, it cannot be written as fraction
now 291.87... is simple, two decimals, so you use two zeros at the botom and end up with

and boom, there you are, a fraction, nice and dandy
now, let's see the first one -√(127) well, low and behold, 127 is a prime number, and and thus is has no two factors that'd serve as root, so, there's no rational root that'd give that, that makes it irrational
Company A offer
2,432×24(semimonthly)
=58,368 per year
Company B offer
2,390×26 (biweekly)
=62,140 per year
So company B pays a greater annual salary
Hope it helps!