2. Place these integers in order from smallest to largest: a) 23: 62; -17; -13; -21; 4; 68; 6 b) 4; -21; -22; 37; -6; -4 4. If a = 4 and b = -8, find the value of: a) The product of a and b d) -12 multiplied by b b) Triple b e) -36 divided by a 6. A submarine is situated at 28 m below sea level. a) It descends by 14 m. What is its new depth? 40 minutes c) The difference between a and b f) The sum of a and b 5. Mount Everest is the highest point in Asia and is 8 848 m above sea level. The Dead Sea is the lowest point in Asia with a height of 423 m below sea level. What is the difference in height between these two places? b) If it rises at a speed of 7 metres in one minute, how many minutes will it take to reach the surface? 7. The table below shows the lowest and highest recorded temperature of five cities. Lowest recorded temperature Highest recorded temperature City Beaufort West -5 °C 41 °C Kimberley -7°C 40 °C Durban 6 °C 37 °C Soweto -7 °C Upington -5 °C 33 °C 42 °C a) What is the difference between the lowest and highest recorded temperature in Beaufort West? b) What is the difference between the lowest recorded temperatures in Kimberley and Durban? (4) (2) (12) (6) (2) (4)​