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Date Name Practice 2 In Exercises 1-6, use the change-of-base formula to evaluate the logarithm. AL lope S 2. log, 11 3. log, 10 4. logs 15 6. log, 30 6. log, 5 7. Fora sound with intensity / (in watts per square meter), the loudness L(/) of the if 5 sound (in decibels) is given by the function L(/) = 10 log 7 where J, is the 0 intensity of a barely audible sound (about 10\" watts per square meter). a. The sound of a coach's whistle is five times greater than the intensity of the referee's whistle. Find the difference in the decibel levels of the sounds made by the coach and the referee. b. The bass guitar player in a band turns up the volume of the speaker so that the intensity of the sound triples. By how many decibels does the loudness increase? 8. Describe and correct the error in expanding the logarithmic expression. Xx In a/xy = 4 Inx + Iny