BRAINLIEST TO CORRECT PLEASE HURRY

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

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5