Answer:
Difference between the two elevations = 1846 ft
Step-by-step explanation:
We are given that;
Stone mountain is 1686 feet above sea level
Lake lanier lowest depth is 160 feet below sea level
Now, elevations at sea level is 0 ft while those below are negative and those above are positive.
Thus;
Elevation of Lake lanier = -160 ft
While elevation of stone mountain remains 1686ft.
Thus,difference in elevation = 1686 - (-160) = 1686 + 160 = 1846 ft