9. Write the equation of a logarithmic function that has been vertically stretched by 5, reflected in the x-axis, horizontally compressed by 1/3, moved 11 units left and 8 units down. Justify your answer. [A5] [C2] 10. The point (-23, -13) is on the transformed function: y = -2log,l-5(x + 3)]-9. Find the original point on the parent function f(x) = log0x. Justify your answer. [T4] [C2] 11. Ethan bought new car worth $60 000. After 5 years, the car was worth $35 429.40. Calculate the depreciation rate of the Ethan's car. [T4] [C2] 12. The hydrogen ion concentration of a lemon is about 0.01. What is its pH? 13. How does an earthquake of magnitude 8.4 compare to an earthquake of magnitude 3.7? Round answer to the nearest whole number. [A4]