Answer:
10
Explanation:
1 acre = 43560 ft²
3/4 acre = 3/4 × 43560 ft² = 32670 ft²
The lawn is 32670 ft².
Each bag covers 3500 ft².
number of bags needed = 32670/3500 = 9.33
You need approximately 9 1/3 bags, but since you must buy full bags, you must buy 10 bags.
Answer: 10