Question

Kyle is currently 60 feet above sea level which correctly describes the opposite of Kyle's elevation?

60 feet below sea level,
60 feet above sea level
6 feet below sea level
or at sea level

Answer 1

the opposite of a number is found by switching the sign.
So the opposite of + 60 (because she is above sea level) is a - 60.......60 ft below sea level.

Answer 2

60 ft. Below sea level