Flooding

publish date: 2025/12/27 21:55:6.778041 UTC

After a heavy rainstorm, a river that had been 9 feet under flood stage rose 11 feet in a 48-hour period.

Represent that level of the river before the storm using a signed number. (1)

Find the height of the river after the storm in comparison to flood stages. (2)

(1) -9

(2) 2

Before the storm, the river was 9 feet under flood stage, so its level is -9

The river rose 11 feet: -9 + 11 = 2

So after the storm, the river is 2 feet above flood stage.

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