A store finds that its sales decline after the end of an advertising campaign. On the day that the campaign ends, daily sales are $8,500 and 3 days after the end of the campaign daily sales are $5,100. Usual daily sales for the store total $3,500. Assume the decline in sales follows the pattern of Newton's Law of Cooling (Heating). What are daily sales for the store 7 days after the end of the advertising campaign

The sales for the store 7 days after the end of the advertising campaign is  

          $3849.74

Step-by-step explanation:

From the question we are told that

    The daily sales on the end of campaign day is   =  $8,500

     The  daily sales three days after end of campaign day is   = $ 5,100

     The  usual day sales of the store is  =  $ 3,500

Generally the Newton's Law of Cooling (Heating). equation is  mathematically represented as

Here t is the number of day after the campaign ended

Now substituting values to obtain the constant k

For  t =  3

=>    

=>      

=>        

So at  t =  7

substituting values

    $3849.74

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

true

step-by-step explanation: