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Please help me.

The elevation of city A is 80 feet below sea level; the elevation of city C is 16 feet below sea level. the elevation of city D is 1/2 of the elevation of city C. Part A: Write and expression to represent the elevation,in feet, of city D. Part B. Solve the Expression and explain why the answer is a negative or positive .

Please Help Me The Elevation Of City A Is 80 Feet Below Sea Level The Elevation Of City C Is 16 Feet Below Sea Level The Elevation Of City D Is 12 Of The Elevat class=