How many significant figures are in 0.004030?

Answer 1

Significant figures are counted from left to the right, starting after the first non-zero digit.

Thus the first significant figure in 0.00570 is the 5. Zeros to the right of significant figures are counted as significant, therefore all the digits '570' are significant. Thus in the case of 0.00570 the answer is that there are three significant figures.

Remember: Right zero's are significant, lefties are not.

Answer 2

5 of them.

Answer 3

four

Answer 4

4 of them.

Answer 5

Five

Answer 6

Six.