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If the number inside the radical is a perfect square or a ratio of perfect squares.

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Q: How can you tell the value of a radical is a rational number?
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Related questions

How can you tell the value of a radical is not a rational number?

It is not easy. If the value is rational then you must be able to express the value under the radical sign as p2/q2 where p and q are integers and q is non-zero. If not, then the number is irrational.It is not enough to require that for a rational, the number under the radical must be a perfect square since sqrt(2.25) is rational even though 2.25 is not a perfect square.

Is 0.91 rational?

Yes. You can tell because there is a finite number of decimal places. 0.91 = 91/100 which is a rational number.

How can you tell a number is an rational number?

When it can be expressed as a fraction

How do you tell if a number is rational or irrational?

a rational number repeats but terminates.ex:3.333333333. a irrational number doesn't terminate or repeat itself. ex:3.334334433444.

How can you tell whether a square root of a whole number is rational or irrational?

If the whole number is a perfect square, its square root is rational. If not, it's not.

Is the number 0.040040004.. rational or irrational number?

It is not possible to tell. There is no recurring pattern that can be discerned.

How can you tell the difference between a rational number and an integer?

You probably don't have to inspect that pair too closely.Every integer IS a rational number.

Is square root of 101 rational or irrational?

It is irrational.

When a number is written in decimal and acirc and 128 and 139 form how do we know if the number is a rational and acirc and 128 and 139 number?

You cannot. There is no way to determine if the number has or has not been rounded and so no way to determine if the number is a terminating, repeating or other form of decimal number. Without that information you cannot tell if it is rational.

How are rational different from irrational numbers?

Another clue is that the decimal goes on forever without repeating. So you can tell if it is Rational or Irrational by trying to write the number as a simple fraction.

What does a decimal number tell you?

It tells you the value (and sign) of the number.

Is the number 23 an irrational number or a rational number?

Rational.All counting numbers (1, 2, 3 etc.) are rational. In fact many fractions/decimals are rational too. Rational just means that we know when the numbers stop.A good example of an irrational number is Pi, which equals 3.14159265358979.... and it just keeps going. No one knows the exact number of pi because as far as anyone can tell, the numbers keep going forever without any proper repeating pattern.

How can a number's position on a number line tell its value?

From least to greatest


Basically, each number is the square root of its square. So, if you square 59, the result will tell you what number you need to take the square root of, to get 59.

How can you tell that a number is rational?

If you can write the number as a fraction, with integers in the numerator and the denominator, it is rational. In the case of decimal numbers, if the decimal representation terminates (e.g. 2.16), or is periodic (perhaps after some initial digits, like 4.130202020202...), then it is rational. For numbers defined according to some rule, it is not always known whether they are rational or irrational. ILuv You!![; <3 Hope This Helps You!!(:

How can you tell if adding two rational numbers with different is a positive negative or zero?

Consider the absolute values (the numerical values ignoring the signs) of the two numbers. If these are equal then the sum is equal; otherwise the sum takes the sign of which ever number has the larger absolute value.

When a number is written in decimal form how can you tell if it's a rational number?

We know that a real number is rational if and only if, when expressed as a decimal, it has a finite or recurring expansion. . . (put a point exactly over 8 and 2). For example, 5/4 = 1.25, 2/3 = 0.6, 20/7 = 2.857142857 or 20/7 = 2.857142

What is the value of 1.19?

This cannot be answered. You will have to tell me what place value you are wanting to place the number 1.19 at.

How can you tell if a rational number is repeating without dividing?

If the denominator has ANY prime factor other than 2 or 5, then the decimal is repeating.

What does mode tell you in data?

The value that occurs the most number of times.

What does the logarithm of a decimal number tell you about a number?

Near enough the exact value of the number. Logarithms, for positive numbers, have are invertible.

What does the absolute value of a number line tell you?

The distance between the number far from it and the actual number.

What does tell the place value of the underlined number then round the number to that place?

362 wer is the nearet tens

What is the age and value of a Ruger single six 22 cal serial number 810003?

Impossible to value on just the serial number. Call Ruger and they will tell you how old.

What is value in third grade level math?

well value is when you tell the value of a specific number. For example 2940, say your teacher asks you the value of the 2 in the number. The value would be 2,000. Another example is 45,728, your teacher asks you the value of the 7 it would be 700.