Answer :
Amy uses a total of 8 cups of sand for her sand art project by multiplying 1/2 cup of sand per color by 16 colors.
To find the total amount of sand used, we have to multiply the amount of sand in one color (1/2 cup) by the number of different colors (16).
Step-by-step calculation:
1/2 cup of sand/color × 16 colors = 8/2 cups = 8 cups of sand.
Therefore, Amy uses a total of 8 cups of sand for her sand art project.