the cement of a mountain pass is 8,050 ft above sea level the valley below is 12 and 1/2 ft below sea level what is a vertical distance between the cement and the valley

1) Let's sketch this to better understand
2) The vertical distance between the cement and the valley
can be found
Let's turn the 12 1/2 from the valley to decimals. 12 1/2 = 12.5
The distance from the top of the mountain to the valley. Considering sea level =0.
8050 +12.5 = 8062.5 ft