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Hunterc · Answer 1 · 2019-03-10T10:58:16+0000

√42 is an irrational number, because you cannot express the answer as a fraction (ratio), and it certainly isn't a whole number or an integer.

Billmaya · Answer 2 · 2019-03-14T12:55:54+0000

The answer is D: irrational number

Rational numbers are numbers that ca be written as a fraction. that is in form of a/b.

√42 = 6.480740698.......

√42 can not be written in the form of a/b, neither is it a whole number. So √42 is not a rational number.