Since "a" is on the top and the bottom, you can simplify that


Answer:
The number of pages that will make the cost of printing equal for both options is 500
Step-by-step explanation:
Please, kindly see the attached file for explanation
Answer:
If you count the bottom layers that cant be seen, then it's 16 cubes.
Answer:
4. 1/25
5. 1/16
6. 2/9
7. 5/567
8. 1/40
9. 2/175
10. 1/30
11. 2/5
12. 9/8
13. 4/3
14. 1
Step-by-step explanation:
sorry I only know how to do 4-14. I hope this helps you.