The answer is 38,400 
The scale is 1:40 so the side that is 4 in becomes 160 and the side that is 6 in becomes 240 
Multiply 160 and 240 and that is the area of the room
Hope this helps
        
             
        
        
        
I got:
by multiplying each factor....
x^4 - 2x^3 - 2x^2 + 2x^3 - 4x^2 - 4x + 3x^3 - 6x - 6
then combining like terms....
answer is:
x^6 - 3x^2 - 10x - 6
        
             
        
        
        
Answer:
3. 156 / 0.2 = $780
4. 9.75 / 0.25 = $39
Step-by-step explanation:
I hope this helped :)
 
        
                    
             
        
        
        
The mean = 28.55, while the standard deviation is 13.16
1. The histogram is an attachment
<h3>How to calculate for the mean of the data set</h3>
We have the following numbers
24 30 4 42 40 26 23 36 12 45 29 21 34 16 47 28 32 54 19 9
The sum of these numbers is given as 
571
The total numbers = 20
The mean = 571/20
= 28.55
<h3>2 =  How to find the standard deviation</h3>
=  (24 - 28.55)2 + ... + (9 - 28.55)/20 - 1
=  3292.95/19
=  173.31315789474
s =  √173.31315789474
=  13.164845532506
Read more on mean and standard deviation here: 
brainly.com/question/26941429
#SPJ1
 
        
             
        
        
        
Answer:
(x + 2)(x - 8) 
Step-by-step explanation:
You had your signs altered. You want your B to result in -6, not 6.
I am joyous to assist you anytime.