Answer: The combined mass of the quarters is 11.863 g.
Step-by-step explanation:
1. You have the following information given in the problem above:
- The mass of the modern quarter is 5.623 g.
- The mass of the older silver quarter is 6.24 g.
2. Therefore, to calculate the combined mass of the quarters, you only need to add the mass of the modern quarter (5.623 g) and the mass of the older silver quarter is (6.24 g), as you can see below:
Let's call the combined mass of the quarters [tex]x[/tex]. Then:
[tex]x=5.623g+6.24g\\x=11.863g[/tex]
