Each bag of birdseed holds 36 cups. Amy feeds the parakeets at a pet shop 4 cups each day. If b represents the number of bags used each month, which equation shows how to solve for b? The average month is 30 days long. 9 = b 30 + 36 + 4 = b 30 × (36 ÷ 4) = b 30 ÷ (36 ÷ 4) = b
The correct answer is : 30 ÷ (36 ÷ 4) = b, because 36 ÷ 4 represents how many days one bag lasts, we have 30 days in a month, so then 30 ÷ (36 ÷ 4) = b.
