Asubmarine starts at sea level and descends at a rate of 15 meters per minute for 2 hours. which statement best describes the submarine descent mark all that apply. a. submarine has descended 600m after an hour b. halfway into his descent, the submarine has descended 900 m c. after 0.5 hours, the submarine had descended 450 m d. the the submarine descends to a depth of 1800 m e. after 2 hours, the depth of a submarine is double what it was after an hour f. after 2 hours, the depth of the submarine is triple what it was after 0.5 hours