Which of the following numbers is rational?

Question

I.  - \sqrt{\frac{4}{9}}

II.  \sqrt{0.49}

III.  \sqrt{400}

A. I only
B. II only
C. III only
D. I and II only
E. I, II, and III

baruto · Answer

I.  - \sqrt{\frac{4}{9}}  = - \frac{2}{3}  Rational

II.  \sqrt{0.49}  = 0.7 Rational

III.  \sqrt{400}  = 20 Rational

Hence E

Abhishek009 · Answer

All I , II and III are rational numbers , Answer must be (E)

Fdambro294 · Answer

An irrational number is any real number that can not be expressed as the quotient of 2 integers (i.e., a non-recurring, non-terminating decimal)

I ——-> can be simplified to -(2/3)

Is a recurring decimal and can be expressed as a fraction

II ———> can be expressed as .7

A terminating decimal is a rational number that can be expressed as a fraction (7/10)

III - can be expressed as 200

An integer is a rational number (200/1)

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