Rock music accounted for 34.5% of the total sales of recorded music in 1999, and 22.8% 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.

d

step-by-step explanation:

d

step-by-step explanation:

let's assume

number of candles set =x

price of of x candles =p(x)

we are given

a candle maker prices one set of scented candles at $10 and sells an average of 200 sets each week

so, we get point as (200,10)

he finds that when he reduces the price by $1, he then sells 50 more candle sets each week

so, we can find slope

now, we can use point slope form of line

now, we can plug values

we can use point

and find b

now, we can plug it back

and we get

now, we can find revenue

we know that

revenue = price*quantity

so, we get