[<Answer>] (2):
<em>Hello! I'm Avery. And I'm here to help! :)</em>
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[<The Explanation>}:
Sally has pet snail that fell into a well.
(Depth of the well = 16 feet)
Snail climbs up 5 feet but each night it slides back down 4 feet.
So the snail climbs up per day = 5 feet - 4 feet = 1 feet.
Number of days snail took to reach at 11 feet = 11 × 1 = 11 feet
Remaining distance to cover by the snail = 16 - 11 = 5 feet
Number of days to cover remaining 5 feet to reach the top of the well = 1 day
Therefore, snail will take 12 days to reach the top of the well.
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[<Ending>] <3
<em>Hope this helps and if it's wrong, you can't sue me! :D</em>
Bye! Hope this works for you :)
Have a nice day! <em>- Avery <3</em>