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Mathematics, 11.11.2020 19:20 3peak101

The high tide at midnight was 7.1 feet. The tide went down 8.7 feet at 7 AM, went up 5.4 feet at 1 PM, and went down 2.1 feet at 8 PM.
What was the height of the low tide at 8 PM? *

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The high tide at midnight was 7.1 feet. The tide went down 8.7 feet at 7 AM, went up 5.4 feet at 1...
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