To determine which measurements have three significant digits, we need to identify the significant figures in each option provided.
- 0.0050830 - The leading zeros are not significant. The significant figures here are 5, 0, 8, 3, and the trailing zero (after the decimal point) is significant. So, this measurement has five significant figures.
Now, let's analyze each measurement:
A. 134 meters - All digits (1, 3, and 4) are significant. This has three significant digits.
B. 56.09 inches - All digits (5, 6, 0, and 9) are significant. This has four significant digits.
C. 0.52 centimeters - The leading zeros are not significant. The significant figures are 5 and 2. This has two significant digits.
D. 8009 miles - All digits (8, 0, 0, and 9) are significant. This has four significant digits.
Therefore, the measurement with three significant digits is:
A. 134 meters