the selling price would be 60.75
 
        
             
        
        
        
Answer:
6 cubic cm
Step-by-step explanation:
3 · 3 · 2 = 18
18 · 1/3 = 6
 
        
                    
             
        
        
        
Answer: Option C.
Step-by-step explanation:
 Use the formula for calculate the volume of a cone:
 
 Where r is the radius and h is the height.
 Volume of the cone A:
 
 
 Volume of the cone B:
 If the height of the cone B and the height of the cone A are the same , but the radius of the cone B is doubled, then its radius is:
 
 Then:
 
 Divide  by
 by  :
:
 
 Therefore: When the radius is doubled, the resulting volume is 4 times that of the original cone.
 
        
                    
             
        
        
        
Answer:
down below.
Step-by-step explanation:
20 × 400 = 8000
8000 - 7200 = 800
therefore the % mark up is 10%, because 10% of 8000 is 800. 
800 + 7200 = 8000