Determine the number of significant figures in the measurement 0.007890 s.

Express your answer numerically as an integer.

The number of significant figures in the measurement is 4. Significant figures of a number are digits that carry meaning contributing to its measurement resolutions. These includes all digits (nonzero numbers), any zero between two non zero numbers is significant, a final zero or trailing zeros in the decimals are significant, all other zeros not mentioned are not significant.

There are 4 significant figures in 0.007890. These are 7890, which has non zeroes 7 8 9 and a trailing zero after the non zero. The leading zero or the zeroes before the non zero digit in a decimal is not considered to be significant numbers. Zeros can also be considered significant if they exist between non-zero numbers like 2018.