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Yes, because it has a finite number of digits and can therefore be written as a ratio of integers. If you meant to put a "..." at the end, it would still be rational.
Let x = .232323...
100x = 23.232323...
100x - x = 23.232323... - x
99x = 23.232323... -.232323...
99x = 23
x = 23/99
.232323... = 23/99
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yes
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yes
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It is a rational number, as it can be written as a fraction.
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As much as, in these days of uncertainty, anything can be anything. As long as the constraints of a rational number are kept to, a rational number will always remain a rational number.
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Since it can be written as a fraction (9.0 = 90/10), then it 9.0 is a rational number.
