Answer :
Final answer:
The significant figures in the number 7000 are usually considered to be just the '7' if the zeros are placeholders, resulting in one significant figure, unless additional context indicates the zeros are significant.
Explanation:
The concept of significant figures is important in measurements and scientific calculations. When discussing the number 7000, it is not immediately clear how many significant figures are present because it depends on whether the zeros are place-holding or significant.
If we were to assume 7000 is a precisely measured number with three trailing zeros that are significant, then it would have four significant figures. However, without additional context or formatting (such as a decimal point or an overline), the zeros in 7000 are typically considered placeholders, indicating that only the digit 7 is significant.
In summary, the rules state that all nonzero digits are significant, embedded zeros between significant digits are also significant, and trailing zeros in a whole number without a decimal point are usually not significant unless otherwise indicated.
