From start to finish, a machine can fill a bottle of water, seal it, label it, and pack it in 8.6 seconds. About how many bottles of water are packed in 480 seconds?

Each bottle takes 8.6 seconds, so in 480 seconds the machine packs about 480 ÷ 8.6 ≈ 55.8 bottles. That is about 56 bottles, and the closest choice is 50 bottles.

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