What is the percent of decrease from 40 to 22?

45% decrease

Step-by-step explanation:

The formula for percent of decrease/ increase is

Original - change/ original

So 40 - 22 = 18

18/40 = 0.45

Turn 0.45 to percent by moving the decimal two spaces to the right

45%

You can check by multiplying the original number by the percentage. So,

40 x 0.45 = 18

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