question. 1 The temperature one afternoon at 3 PM was 66 degrees and by 10 PM it was 17 degrees. What was the total change in temperature? question 2, A miner started at 8 feet above sea level and then traveled 23 feet straight down into a mine shaft. What was the miner's elevation after traveling down the mine shaft? question 3. An underwater canyon begins at 40 feet below sea level and is 105 feet deep. What is the elevation of the bottom of the canyon?