A submarine hovers at 240 meters below sea level. If it descends 160 meters and then ascends 390 meters, what is its new position?
240 meters below sea level means a negative number, so we start with:
-240
Descending 160 meters means our depth decreases, so we subtract:
-240 - 160 = -400
Ascends means our depth increases, so we add:
-400 + 390 = -10 or 10 feet below sea level
240 meters below sea level means a negative number, so we start with:
-240
Descending 160 meters means our depth decreases, so we subtract:
-240 - 160 = -400
Ascends means our depth increases, so we add:
-400 + 390 = -10 or 10 feet below sea level
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