I'm so confused by these equations can you please explain it to me?

Question 1: 5 pts The table shows the viscosity of an oil as a function of temperature. Identify a quadratic model for the viscosity, given the temperature. Then use the model to predict the viscosity of the oil at a temperature of 140 C. T ( C) Viscosity (kg/ms) 110 10.8 130 8.2 160 5.8 O Rx) = 0.001x2- 0.37x + 39.4 The viscosity of the oil at 140 C is about 31.8 kg/ms O RX) * 0.001x2 - 0.37x + 39.4 The viscosity of the oil at 140*C is about 7.2 kg/ms. (x) * -0.001x2 + 0.37x + 39.4 The viscosity of the oil at 140'C is about 31.8 kg/ms. O (x) -0.001x2 + 0.37x + 39.4 The viscosity of the oil at 140*C is about 7.2 kg/ms. Question 2: 5 pts Identify the sum in the form a + bi. (-3 + 21) + (5-71) O - 2 + 3i 2 + 51 2 - 51 O - 2 - 81 Question 3: 5 pts Determine the quadratic inequality that produces the graph below