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Earn +20 ptsQ: Is 7.25 a rational number
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Is 0.725 rational or irrational?
All finite numbers are rational. A rational number is any number that can be expressed as one integer divided by another. 0.725 is clearly rational because it can be expressed straight off as 725/1000. Even though that isn't the simplest fraction to mean 0.725, it is enough to show that 0.725 must be rational.
Is the product of a rational number and a rational number a rational number?
yes
Is a rational number multiplied a rational number rational?
Yes.
Is the number 17.5 a rational number?
yes
Which number can be multiplied to a rational number to explain that the product of two rational numbers is rational?
It must be a generalised rational number. Otherwise, if you select a rational number to multiply, then you will only prove it for that number.
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