1. The slope of a position vs. time graph is quantitatively equivalent to?

Apply rules in significant figures

2. 21.9074 s + 34.8 s =?

3. 34.8 s - 21.9074 s =?

4. 8.4 m / 3.8 s =?

Count the number of significant figures:

5.) 300

6.) 300.0

7.) 0.0000030

Answer with brief explanation