Part B (from Worked Examples 69, pp. 485-487) As you read along in the textbook, the answers to most of these questions should become blindingly obvious. Please be sure to answer each question directly and completely. 6. Biff shows how to use the Five Amigos to sketch a quick graph of logarithmic functions. He also says not to forget something, What? 7. How does Biff generate a graph of a transformed function such as f(x) = log, (x + 4) -2 ? 8. How many decibels is one half-life? So if the power level decreases from 20 to 5, that represents a drop of how many decibels? (Do NOT use a log formula.) 9. Write the decibel formula. Calculate the decibel drop (to two decimal places of accuracy) if the power level decreases from 20 to 5. 18 10. Show how to solve for x: -20 = 10 . log