It is 8.00
0.0086
0.015
0.0003
0.0102
6,762 to 3 significant figures is: 6,760
0.0082
3 significant figures; 2 1 8
20.375
20.875
When rounded to three significant figures, 3.738 mL becomes 3.74 mL. Remember, to round to three significant figures, you start counting from the first non-zero digit from the left.
0.0083
For three significant digits, this number has to be rounded at the ones place. So if you look at the number after the ones place (8), you see that you need to round up. The final answer is 45.0 - the zero after the decimal is significant.