Question

how many significant figures does each measurement have?

52,000,000 km = significant figures

Explanation:

Identify the given measurement

We are given the measurement \(52,000,000\text{ km}\).

Analyze non-zero digits

The digits \(5\) and \(2\) are non-zero.
All non-zero digits are significant.
This gives at least \(2\) significant figures.

Analyze trailing zeros

The zeros follow the non-zero digits.
There is no decimal point in \(52,000,000\).
Trailing zeros in a whole number without a decimal point are not significant.
Thus, only \(5\) and \(2\) are significant.

Answer:

How many significant figures does each measurement have?

\(52,000,000\text{ km} =\) <blank>2</blank> significant figures