Question

How many significant figures does 0.00340 have?

Answer 1

Greetings!

"How many significant figures does 0.00340 have?"...

A significant figure is:
-A non zero number
-A zero in between non zero numbers
-Trailing zeros to the right of the decimal point

Therefore, this number has three significant figures:
3,4,0

Hope this helps.
-Benjamin

Answer 2

3 because the 0 is behind the decimal and 34 and the other zeros arent behind a non zero digit and 3 and 4 are non zero digits