Answer: The answer is A : 6x^2+24x+24
Step-by-step explanation:
(2x+4)(3x+6)
multiple the two equations together
2x*3x=6x^2
2x*6=12x
4*3x=12x
4*6=24
combine like terms 
6x^2+12x+12x+24
6x^2+24x+24
 
        
             
        
        
        
your answer would be 19 inches because 24 divided by 12(length of a foot in inches) is 2 and therefore you also divide 4.75 by 2 to get 2.375 and multiply that by 8 the amount of feet and your done
 
        
             
        
        
        
<span>79.99/6.75%=5.399325 if you want the exact but 5.40 if you want rounded</span>