Answer: There are 4 boxes that Raymond buy.
Step-by-step explanation:
Since we have given that
Number of children will attend the birthday party = 28
Number of favors in a box = 70
Number of party favors get by each child = 10
So, Total number of party favors get by 28 children is given by
![28\times 10\\\\=280](https://tex.z-dn.net/?f=28%5Ctimes%2010%5C%5C%5C%5C%3D280)
So, Number of box they need to buy is given by
![\dfrac{280}{70}=4](https://tex.z-dn.net/?f=%5Cdfrac%7B280%7D%7B70%7D%3D4)
Hence, there are 4 boxes that Raymond buy.