How do you do this. Please help I am in the middle of a quiz right now. Its only 8th grade math

Which expression is equivalent to sq-80

What could explain what happened when the time was equal to 120 minutes

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest