Final answer:
The change in elevation from 100 feet above sea level to 60 feet below sea level is 40 feet.
Step-by-step explanation:
To find the change in elevation from 100 feet above sea level to 60 feet below sea level, we need to add the two values together.
100 + (-60) = 40 feet
The change in elevation is 40 feet.The change in elevation from a point 100 feet above sea level to a point 60 feet below sea level is the sum of the distance above sea level and the distance below sea level. To calculate this, you add 100 feet to 60 feet, because when you go below sea level, you are moving further away from your starting point above sea level. Therefore, the change in elevation is 100 feet + 60 feet = 160 feet.