Answer :
Final answer:
Sally's snail will take 8 days to climb out of the well by progressing 1 foot each day.
Explanation:
Sally's snail will take 8 days to get to the top of the well. Each day, the snail climbs 5 feet and each night it slides back down 4 feet. This means the snail makes a net progress of 1 foot each day towards the top of the well.
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