A mountain climber is at an elevation of 10,000 feet. If she descends 2,000 feet a day, which equation would be used to show how many days it will take to reach sea level (0 feet)? 10,000 ÷ 2,000 -10,000 ÷ 2,000 -10,000 ÷ (-2,000) 10,000 ÷ (-2,000)