The number 4.930 x 10⁴ m has four significant figures. Scientific notation clearly indicates all significant figures before the exponent.
The significant figures in a number are the digits that carry meaning in terms of precision and accuracy. In scientific notation like
, the significant figures are the non-zero digits (in this case, 4, 9, 3, and 0), plus any zeros between them and after the last non-zero digit (since they are part of the notation and hence significant).
So, in
, there are four significant figures (4, 9, 3, and 0).
Question:
How many significant figures are in 4.930 × 10⁴?