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Significant figures

If I have 19732947.44
Asked to put this in 3 significant figures would this be 19700000
And in standard form to 3 significant figures would it be 1.97×10^7?

Reply 1

A-Conquer

19700000
which is 19.7 million (19.7x10^6)
so 1.97x10^7 yeah

Reply 2

Helloaaa

Original post by A-Conquer

19700000
which is 19.7 million (19.7x10^6)
so 1.97x10^7 yeah

When we put the 5 0's after 197 why do we ignore the numbers that came after the dot?

Reply 3

A-Conquer

the values after the decimal?
19700000.00 is the same as 19700000 , it's just neater and shorter to not include them.

Reply 4

A-Conquer

Also the values after the decimal are not included in the Sig Figs so they would be truncated

Reply 5

username4748284

Original post by Helloaaa

When we put the 5 0's after 197 why do we ignore the numbers that came after the dot?

Because if you put 19700000.00 it means that the number is exactly that and hasn’t been rounded. Writing 19700000 however shows that it has been done to 3sf.