45.0 is the 44.981 to 3 significant figures.
58.5422 to three significant figures is 58.5 while to three decimal places is 58.542
Simply cut off the extra digits and round the third: 56.6
The answer depends on how many significant figures the number is to be rounded to. This information is not provided and so the question cannot be answered.
57.0
67.0
18.1
56.6
67.0
6
Five, two and five sig figs respectively.
There are 4 of them
22.4 has three significant figures.
There are 6 significant figures in this number.
There are three significant figures in 70200.
0.0034088 in three significant figures would be 0.00341
130
31,500
201
It is: 1040
21.3
0.00241
0.990
The number 10.989 rounded to 3 significant figures is 11.0
79,900
It's already there.
6.71 is 6.7050 is rounded to three significant figures.