Question

how many significant figures does each measurement have?

52,000,000 km = 2 significant figures

3,000. g = 4 significant figures

0.0000750 m = significant figures

Explanation:

Identify non-zero digits and leading zeros

The given measurement is \(0.0000750\text{ m}\).
The non-zero digits are \(7\) and \(5\).
The zeros before the first non-zero digit (\(0.0000\)) are leading zeros, which are never significant.

Identify trailing zeros in a decimal

The zero after the \(5\) is a trailing zero in a number containing a decimal point.
Trailing zeros in a decimal number are always significant.

Count the total significant figures

The significant digits are \(7\), \(5\), and the trailing \(0\).
Total count of significant figures is \(3\).

Answer:

How many significant figures does each measurement have?

\(0.0000750\text{ m} =\) <blank>3</blank> significant figures