Q: Is 7.2 rational

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No, they are not.

It isn't.

7 and 2/10 or 72/10

There is not "the" rational number since there are infinitely many. A rational number between the two given numbers is the mean [average] of the two: 0.5*(4/9 + 11/12) = 0.5*(16/36 + 33/36) = 0.5*49/36 = 49/72

It is a composite, even and rational number It is 23*32 as product of its prime factors in exponents It is a multiple of 9 Its reciprocal is 1/72 Its digital sum is 9 It is LXXII expressed in Roman numerals

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No.

No, they are not.

Yes.

It isn't.

7 and 2/10 or 72/10

The square root of 72 is an irrational number. Since 72 is not a perfect square, the decimal is endless. (just like the value of pi)

72 is an integer, not a fraction. It is possible to express it in rational form as 72/1. Since the denominator is 1 is cannot be reduced. The above form is, therefore, the simplest.

1, 8, 9

A rational number is a number that can be written as the ratio of two integers. Examples are: -- any integer, like 793 -- any fraction, like 72/91 -- any decimal that ends

yes because it can be written as a fraction where the denominator is not equal to 0 example: 36/1, 72/2

There is not "the" rational number since there are infinitely many. A rational number between the two given numbers is the mean [average] of the two: 0.5*(4/9 + 11/12) = 0.5*(16/36 + 33/36) = 0.5*49/36 = 49/72

It is a composite, even and rational number It is 23*32 as product of its prime factors in exponents It is a multiple of 9 Its reciprocal is 1/72 Its digital sum is 9 It is LXXII expressed in Roman numerals