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1 of them.
2 of them.
38 kg
5 significant figures.
7000 grams
They are equivalent.
Because 1000 g are equal to 1 kg, 7000 g is equivalent to 7 kg.
It is: 7000 rounded to 1 significant figure
7000 g = 7 kg
7000 kg = 7,000,000 grams
15432.35835294143
1. Unless there is a unit right after the number (like 7000 lbs), then there would be 4 significant figures.