Answer:
D
Step-by-step explanation:
The remaining material can be calculated as
volume of larger cube - volume of smaller cube
= a³ - b³ ← difference of cubes which factors in general as
= (a - b)(a² + ab + b²) → D

The account will have decreased by $2640 after 2/3 year.
Answer:
-3.7
Step-by-step explanation:
I think its B Because u have the total of pencils and how much they cost now u need to how know many pins you have to know how many they have in total