2. The table describes the cooling of a cup of coffee as it sits out after...
2. The table describes the cooling of a cup of coffee as it sits out after being poured. DATA TABLE Time (min) 0 1 Température First Differences Second Differences Common Ratio (Degrees (round to two Celsius) decimal places) 55 52.8 50.7 48.7 46.7 39.7 33.7 28.6 24.3 بيا | 4 8 12 16 20 What model is the best fit for this data? How do you know?? Equation for the curve of best fit: After how many minutes will the coffee be approximately 18 degrees? Explain your answer. 3. During a normal 5 second respiratory cycle in which a person inhales and then exhales, the volume of air in a person's lungs can be modelled by V(t) = 0.027 -0.27t? +0.675t, where volume, V, is in litres andt is the time in seconds. In this cycle, when is the volume of air in the lungs more than 0.4L? Explain your answer.