Integers ending in 0 are an ambiguous case. The simplest answer is 2 significant figures.
However, if the number appeared alongside 1410, 1390, 1430 I would say 3 sf and if it was with 1403, 1421, 1397 I would have to say 4 sf.
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2 of them.
There is only one number and it has 16 significant figures!
How many significant figures are in 13001kg
3 significant figures.
3 significant figures.