Answer:
D. √2
Step-by-step explanation:
An <em>irrational number</em> is an irrational number if you cannot express it as the <em>quotient of two integers</em> (except zero as the divisor).
A. ⁷⁴/₉₉ = quotient of two integers
<em>Rational
</em>
B. √4 = 2
√4 = ²/₁ = quotient of two integers
<em>Rational
</em>
<em>
C.</em> ¾ = quotient of two integers
<em>Rational
</em>
<em>
D.</em> √2 = 1.414 213 562 …
√2 = <em>not</em> quotient of two integers
Irrational