Algebra 2 Companion Book, Volume 2

7.1 Review Worksheet (continued)

Simplify, if possible. 39. log 2 16 3

1 3

40. log(100) 0.1

41.

log 125 5

43. 3 log 4.52 3

44. log

42. log 3 3

7 + x

9 6561

Evaluate. 45.

46. log 25 125

47. log 4 9

log 16 1 2

48.  After some complaints, it was found that the music from an outdoor concert was 5 decibels louder than the city’s allowable level of 100 decibels. The loudness L of sound in decibels is given by = L I where I is the intensity of sound and I 0 is the intensity of the softest audible sound. How many times more intense is the concert sound than the allowable level?       I 10 log . 0

121

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