7000.
54000
It is 77 because you round 5 to 0, and round 6 to 7.
There are two significant figures in 0.025.
2 significant figures.
88930371.007 to 2 significant figures is 89000000
Rounded to 2 significant figures it is 0.043
8468 rounded to 2 significant figures is 8500
0.004560 to two significant figures results in: 0.0046
0.000039 as you have to round it up. 3 and 8 are the significant figures but as you must round up, the answer becomes 0.000039.
0.067
5200
2700
All of those figures are significant. If you want to round it to 2 sig figs, that would be 13.
7000.
54000
rounded to 3 significant figures it would be .00750