The computation shows that the feet that Julie needs to climb to get back to sea level is 21 feet.
From the information given, Julie hiked down a hill to an elevation of 16ft below sea level and she then hiked down the hill another 5ft.
Therefore, the total feet that she biked down woll be:
= 16 + 5
= 21 feet.
Therefore, the computation shows that the feet that Julie needs to climb to get back to sea level is 21 feet.
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