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It is 12300000
3.2*1.05=3.36=3.4(sf) With two significant figures
I Believe it would be 2.32 x 106.
149.1290861 is 149.13 with 2-place accuracy.
I'm not so sure you can, until you tell me something about the method.
Express it as 9.80 x 10^2
Used to express hesitation or uncertainty.
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.
2 significant figures.
50
320
Sadly, it is measured in Giga-tons. The alternate way to express this Disaster is Giga-Tonnes.
6.21 with one significant figure is just 6
1600
It is 3.01
It is 12300000
The print express.