Question

HELPPP URGENT!!!

The lowest airport in the world is Atyrau Airport in Kazakhstan. Its
runway is 72 feet below sea level. A passenger in a small airplane on
the runway holds her phone exactly 4 feet above the runway. What
is the elevation of her phone? Use a negative sign where appropriate,
and don't include units when typing in the secret answer.
Your answer:

Answer 1

-68ft, or 68ft below sea level

Explanation:

-72+4=-68