mathsucksalot123 4 years ago Rap/hip-hop music accounted for 11.7% of the total sales of recorded music in 1998, and 13.9% of the total sales of recorded music in 2006 . Find the average rate of change of the percentage of sales of rap/hip-hop music from 1998 to 2006 . 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 what percent?

1. helpingtutors

(13.9 - 11.7)/(2006 - 1998) = 2.2/8 = 0.275 = 27.5 %

2. helpingtutors

wait.. 0.275 = 0.28 percent

3. mathsucksalot123

let me chec

4. mathsucksalot123

okay great thats right. Could you maybe check out my one thts basically the sam but says rock instead of rap

5. helpingtutors

please award the medals... and post the next new question

6. mathsucksalot123

i wil for sure. sorry

7. mathsucksalot123

one sec ill get it

8. mathsucksalot123

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 .

9. mathsucksalot123

here it is. I will give u a medal

10. helpingtutors

please make it a new question

11. helpingtutors

dont append the second question here

12. mathsucksalot123

okay i will post it on the feed