The first book has a thickness of 2 3/7 inches
2 3/7 in decimal is :
[tex]2\frac{3}{7}=2.429[/tex]The second book has a thickness of 3.56 inches
The height when stacked together will be the sum of their thickness. This will be :
[tex]2.429+3.56=5.989[/tex]Rounding to the nearest hundredth,
[tex]5.989\sim5.99[/tex]The answer is 5.99 inches
