Question

8 Heights below sea level can be shown by using negative numbers.

a What does it mean to say that the bottom of a valley is at -200 metres?
b A hill next to the valley in part a is 450 metres high.
How far is the top of the hill above the bottom of the valley?

Answer 1

Answer: 650 Ft above the trough of the valley. Explanation 450 - (-200) = 650