From everything I can see in the question, it appears that 80,000 is a whole, real, rational,
natural integer, and a constant. The magnitude of its range and its domain are both zero,
and its upper and lower bounds are both the same number, namely 80,000 .
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The lower bound for 1 significant figure for the number 90000 would be 80000. This is because when rounding to 1 significant figure, we look at the first non-zero digit from the left, which in this case is 9. To determine the lower bound, we keep the 9 in the same place and replace all other digits to the right with zeros.
identifying any upper or lower bounds on the decision variables
124.68 significant figures means figures after the decimal, in the case after the 8, if the number after the significant figure is 4 or lower the last SF (significant figure) stays the same, if 5 or higher then you add one. for example the number 124.683 to one SF is 124.7, because 8 means you round the last number up (add one) * * * * * The above answer could no be more incorrect! It has confused decimal digits with significant digits. 124.683, to 2 sig digits is 120. The two non-zero numbers 1 and 2 and everything else 0.
Oh, dude, when you're talking about the upper and lower bounds of 9 to the nearest integer, you're basically asking for the numbers closest to 9, right? So, the upper bound would be 10 because it's the next whole number above 9, and the lower bound would be 9 because, well, it's 9. Like, it's not rocket science, man.
under 5 billion = 0 more than 5 billion = 10 billion this is higher and lower bounds. Sorry if I misinterpreted