
Patrick W. answered 04/13/15
Tutor
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High School Mathematics Teacher, Passionate Math Geek
You might be over-thinking it.
We assume that 1489=1489.000000000000000000 with zeros going on forever
We leave off the zeros because it's convenient, though with costs they're often used
$1489 rounded to the nearest cent would be 1489.00
rounded to the nearest whole dollar, it's simply 1489.