Step-by-step explanation:
diameter: 8
radius: 4
height: 18

 
        
             
        
        
        
Answer:
Please delete this I accidentally did this
Step-by-step explanation:
 
        
             
        
        
        
Answer:
508.68
*sorry if this is late
Step-by-step explanation:
Divide 36 by 2 to get radius 
Multiply 18 by itself to get 324 
Multiply 324 by 3.14 to get the area of a circle 
Divide it by 2 to get the area of the semi circle 
 
        
             
        
        
        
(2x^2-5x)(4x^2-12x+10) = <span>8x^4 - 44x^3 + 80x^2 - 50x
So, the answer is option C.</span>