Answer:
4
Explanation:
1800/3 = 600
We know that every pound covers 600 square feet:
8400/600 = 14
14/4 = 3.5 (round up) so it would become 4.
I know I am late but here :)
14 bags
Hope this helps :)
1. 1800 ÷ 3 = 600
2. 8400 ÷ 600 = 14 bags
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