Answer:
The decrease in the price will be $4032 
 The price of the next model is $31968
Step-by-step explanation:
The current model costs $36,000. 
The next model of a sports car will cost 11.2% less than the current model
So, decrease in price =
                                    =
                                   =4032
So, the price of next model decrease by $4032 
So, the price of the next model= 36000-4032 =31968
Hence the price of the next model is $31968
 
        
             
        
        
        
She can make 12 scarves if the area of each scarf is 4 square feet.
        
             
        
        
        
Answer: the height in inches, of the pile after 3 weeks is 34 11/12 inches
Step-by-step explanation:
Each consecutive week for the next 5 weeks the height of pile increase by 8 7/12 inches. Converting 8 7/12 inches to improper fraction, it becomes 103/12 inches. The height is increasing in an arithmetic progression. The formula for determining the nth term of an arithmetic sequence is expressed as
Tn = a + (n - 1)d
Where 
a represents the first term of the sequence.
d represents the common difference.
n represents the number of terms in the sequence.
From the information given,
a = 17 3/4= 71/4 inches
d = 103/12 inches
n = 3 weeks
the height in inches, of the pile after 3 weeks, T3. Therefore,
T3 = 71/4 + (3 - 1)103/12
T3 = 71/4 + 2 × 103/12 = 71/4 + 103/6
T3 = 419/12 inches = 34 11/12 inches
 
        
             
        
        
        
Just for future reference always put ^ for exponents. The answer is y-6 though. 
(y-4)(y-6) create that trinomial. You can prove that by using the FOIL algorithm