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Steve
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Is the square root of 19 a rational number?
No. 19 is a prime number, and all prime numbers have irrational roots.
Is 7.76 irrational or rational?
Rational , because it can be converted to a fraction. 7.76 = 7 76/100 = 7 38/50 = 7 19/25 NB Irrational numbers cannot be converted tpo a quotient. 'pi = 3.1415936.... ' it the most famous irrational number. When you are given pi = 3.14' in school , this is only an approximation.
Is 16 rational or irrational?
Rational!!!! Consider ALL numbers to be rational , except those decimals that gor to infinity AND there is no regular order in the decimal digits. Rational ; 2.33333..... Because the decimals are in a regular order. Irrational ; 3.141592.... Because the decimals are in an irregular order. The mathematical definition of irrational numbers that they cannot be converted to a quotient(fraction). NB The three or more stops after the last decimal is the mathemtical indication that it recurs to inifinity. If no stops are shown, then it is deemed to be a terminal decimal. e.g. 2.333 is a terminal decimal 2.33333..... is a decimal recurring to inifity. NNB pi = 3.141592... is the most well known irrational number. However, the 'Square Roots' of prime numbers are also irrational e.g. sqrt(2) = 1.414213562.... sqrt(19) = 4.358898944....
Is square root of 19 irrational?
Yes, they are.
Is -19 a rational number?
-- Any number that you can completely write down using digits, and a decimal point or fraction bar if needed, is rational. -- A rational number is defined as one that can be written as a fraction using whole numbers. -19 can be written as the fraction -19/1 .
