Answer:
Five: 40
Six 8000 - (-50)
Step-by-step explanation:
Five
22 - (-18)
22 + 18
40
Six
She has to look down below sea level. Getting to sea level is 8000 feet. That usually is taken to be the positive direction.
It's the 50 feet that's the problem. The whale isn't floating above her. It is 50 feet below sea level. Worse yet, it is a negative number. Though it goes entirely, against your intuition, it has to be written as
8000 - (-50)
8000 + 50
8050
