4800in.=400ft.
I hope this will help
        
                    
             
        
        
        
12-9=3
3+12+4,5=19,5
19 hours and 30 min
        
                    
             
        
        
        
Answer:
Which i think is the first one, there may just be a typing error.
Step-by-step explanation:
A polynomial of order n has the following format:

In which a is the leading coefficient,  are the roots.
 are the roots.
If a root appears m times, they are said to have multiplicity m.
Leading coefficient of 1 and roots 21 and 31 with multiplicity 1

So the correct answer is:

Which i think is the first one, there may just be a typing error.
 
        
             
        
        
        
Answer:
2/5
Step-by-step explanation:
If Vicki has 100 jelly beans then Bert would have 140. Bert would have to give 40 out of his 140 to Vicki or 40/100 -> 4/10 -> 2/5. Bert would have to give 2/5 of his jelly beans to Vicki. 
 
        
             
        
        
        
Answer:
0.9
Step-by-step explanation:
15% is 0.15 
times 6 by 0.15 and you get 0.9
youl save 90 cents because 15% of 6 is 0.9