6) Write the equation of a logarithmic function that has been vertically stretched by 4, reflected in the x-axis, horizontally compressed by 1/9, moved 11 units up and 12 units left. Justify your answer. 7) Ethan bought a new car worth $54,000. After 5 years, the car was worth $28,497.52. Calculate the annual depreciation rate of Ethan's car. 8) The hydrogen ion concentration of a lemon is about 0.02. What is its pH? 9) How do the intensities of a magnitude 6.0 earthquake and a magnitude 2.9 earthquake compare?

Fig: 1