The masses of four different objects taken with different scales were 23.04 g, 7.12 g, 0.0088 g and 5.423 g. What is the total mass of all four objects to the proper number of significant digits?

The Praxis General Science: Content Knowledge (5435) exam is a test required by many states for credential candidates planning to teach science at a high school level. It is a single, computer-delivered test that includes questions from five content domains.

The content categories are Scientific Methodology, Techniques, and History; Physical Science; Life Science; Earth and Space Science; and Science, Technology, and Society.