Answer:
358
Step-by-step explanation:
MD is 350 feet above sea level and New Orleans is 8 feet below sea level.
If you want to get to the sea level of New Orleans (which is -8 feet) from MD (350) you would have to go down 350 feet to get to 0 then another 8 feet to get to -8.
Add them 350+8= 358 feet apart
