Answer:
Correct answer is option d. increase of $1 in advertising is associated with an increase of $4000 in sales.
Step-by-step explanation:
Given the equation of regression analysis is given as:
where 
is the cost on advertising in Dollars.
and 
is the sales in Thousand Dollars.
To find:
The correct increase in sales when there is increase in the advertising cost.
Solution:
Suppose there is an increase of 
in the advertising cost.
Let the initial cost be then the cost will be 
.
Initial sales
....... (1)
After increase of $1 in advertising cost, final cost:
Subtracting (2) from (1) to find the increase in the sales:
The units of sales is Thousand Dollars ($1000).
So, increase in sales = 
So, correct answer is:
d. increase of $1 in advertising is associated with an increase of $4000 in sales.
It would be 44 in. The reason being the equation to find circumference is:
You use 3.14 for pi and the radius is 7.
43.96 rounded to the nearest inch is 44.
Answer:
<h3>A. y=-2x+3z+25</h3>
Step-by-step explanation:
Isolate the term of x and y from one side of the equation.
<u>To solve:</u>
<h3>2x+y-3z=25</h3>
<u>First, you have to subtract by 2x-3z from both sides.</u>
<u>Solve.</u>
- <u>Therefore, the correct answer is "A. y=-2x+3z+25".</u>
I hope this helps, let me know if you have any questions.
The trip was 6 hours long.
Step-by-step explanation:
Given,
The time to go to the island = 1
hours.
The return trip took 3/4 of the time of the original trip.
To find the time of the trip.
Let,
The time of the original trip is x hours.
The time for returning = 
According to the problem,
1 + = x
or, x - = 
or, 
=
or, x = ×4 = 6 hours
Hence,
The trip was 6 hours long.
