A submarine was situated 450 feet below sea level. If it descends 300 feet. What is its new position?

    
Match the items on the right to the items on the left.
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Positon of submarine = - 450 ft.
It descends 300 feet = -300 ft
New position =
-450 + (-300)
= - 750 ft
It was 750 ft below sea level.