A rational number is one that can be expressed as one integer (whole number) over another integer.
4.89 = 489 ÷ 100 = 489/100
In this form 489 is an integer and 100 is an integer, so 4.89 can be expressed as one integer over another integer, thus it is a rational number.
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4.89 is a rational number because it can be expressed as a fraction in the form of 489/100
489 = 111101001
No, not to a whole number (489/5 = 97.8)
489 is a composite number that is divisible by 3.
No.