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Answer to Question #4128 in Algebra for Victoria

Question #4128
Suppose a musical piece calls for an orchestra to start at fortissimo (about 90 decibels), decrease in loudness to pianissimo (about 50 decibels) in four measures, then in crease back to fortissimo in another four measure. The sound level s (in decibels) of the musical piece can be modeled by function s=10|m-4|+50 where m is number of measures.

1) graph the function for 0<8

2) after how many measures should the orchestra be at the loudness of mezzo forte (about 70 decibels)?
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