# Chapter 4 - Section 4.1 - Approximate Numbers and Accuracy - Exercise - Page 163: 21

4

#### Work Step by Step

$72,0\overline00$ mi has two non-zero digits. One zero is tagged, so it is significant. One zero is between significant digits, so it is significant. The zero to the right is not tagged, meaning that it is not significant. Thus, there are 4 significant digits.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.