SOLUTION: suppose a musical piece calls for an orchestra to start at fortissimo (about 90 decibels), decrease in loudness to panissimo (about 50 decibels) in four measures, and then increase

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Question 496386: suppose a musical piece calls for an orchestra to start at fortissimo (about 90 decibels), decrease in loudness to panissimo (about 50 decibels) in four measures, and then increase back to fortissimo in another four measures. The sound level s (in decibels) of the musical piece can be modeled by the function s= 10*|m-4| + 50 where m is the number of measures.
a). graph the function for 0 is less than or equal to m which is less than or equal to 8
b)After how many measures should the orchestra be at the loudness of mezzo forte (about 70 decibels)?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Link to graph:

http://www.wolframalpha.com/input/?i=f%28m%29+%3D+10|m-4|%2B50+from+m+%3D+0+to+m+%3D+8

The intensity will decrease to mezzoforte (70 dB) after two measures, then increase to 70 dB after six measures.