It is 3.01
I Believe it would be 2.32 x 106.
0.0357 has three significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
To express 6008 to three significant figures, you would round it to 6010. The first three significant figures are 6, 0, and 1. Since the next digit is 8, it rounds the last significant figure (1) up to 2, resulting in 6010.
213000 has 3 significant figures. Expressed as six significant figures would be: 213000.
The number 6.300 has four significant digits. We must assume that the only reason for including the two zeroes at the end is to express the precision of the measurement (whatever it was that was measured to yield this number). If you were only confident about the first two numbers, you would express it as 6.3 rather than 6.300 as you did.
You didn't say how many significant figures. But, rounded to six significant figures it would be 5206.00
Three significant figures would be 29.5cm.
It would be 25.7 to contain three significant figures.
3.00234 to 3 significant figures would be 3.00
0.0034088 in three significant figures would be 0.00341
5,100 in 3 significant figures is still 5,100.
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.