It is: 7000 rounded to 1 significant figure
A number with only 1 significant figure can't be rounded to 3 significant figures
e A number that has only 1 significant figure can't be rounded to 3 significant figures
40000
2
975 rounded to 1 significant number is 1,000
2,468 rounded to 1 significant number is 2,000
It is: 7000 rounded to 1 significant figure
400
3000
0.03
A number with only 1 significant figure can't be rounded to 3 significant figures
It then is: 0.007
10,00010,00010,00010,000
4000 has between 1 and 4 significant figures: if it is a rounded number, then it could have been 3999.9, for example, which would be rounded to 4000 to 1, 2, 3 or 4 significant figures.
54.26 rounded to 1 significant figure is 50
6694 rounded to 1 significant figure is 7000