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Rock music accounted for 30.5% of the total sales of recorded music in 1999 , and 20.4% of the total sales of recorded music in 2009 . Find the average rate of change of the percentage of sales of rock music from 1999 to 2009 .
Round to the nearest hundredth of a percent. Note that the percentage sign is already given in the answer, so you do not need to enter it.
The average rate of change is .
 2 years ago
 2 years ago
Rock music accounted for 30.5% of the total sales of recorded music in 1999 , and 20.4% of the total sales of recorded music in 2009 . Find the average rate of change of the percentage of sales of rock music from 1999 to 2009 . Round to the nearest hundredth of a percent. Note that the percentage sign is already given in the answer, so you do not need to enter it. The average rate of change is .
 2 years ago
 2 years ago

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helpingtutorsBest ResponseYou've already chosen the best response.0
(30.5  20.4)/10 = 10.1/10 = 1.01
 2 years ago

mathsucksalot123Best ResponseYou've already chosen the best response.0
i tried that. it says its wrong :(
 2 years ago

satellite73Best ResponseYou've already chosen the best response.1
that is because your answer should be negative. sales declined over the ten year period
 2 years ago

satellite73Best ResponseYou've already chosen the best response.1
\[\frac{30.520.4}{19992009}=\frac{10.1}{10}\]
 2 years ago
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