# math

MODELING REAL LIFE A diver is diving from a platform 10 meters above the water. The diver reaches a depth of 4 meters. What is the change in elevation of the diver?

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1. suppose he went from 10 to 9 above. How far would that be?
9 - 10 = -1
That is, he went 1m down.

So, going from 10 above to 4 below, the change is
-4 - 10 = -14
He went down 14m (down 10 to the water, then down 4 more)

In general, the change going from a to b is b-a.

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oobleck

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