Answer:
Celine's estimations must be around 12,075 tiles.
Explanation:
Givens:
- There are 7 different colors.
- There are 1725 tiles per color.
If Celine wants to estimate the total number of tiles in that mosaic, then she must be approximated to the product between all colors, and the total number of tiles per color, that is

Therefore, Celine's estimations must be around 12,075 tiles.