Answer:
Volume of bottom of cylinder = Volume of entire cylinder - Volume of top of cylinder
Step-by-step explanation:
Here we have the volume of a cylinder given by
Volume of a cylinder = πr²h
Where the cylinder is cut by a plane into portions of heights, bottom a and top b we have
Height of bottom of is then 
Height = h - b
Therefore, volume of bottom of cylinder = π·r²h = π·r²(h - b)
Volume of bottom of cylinder = π·r²·h - π·r²b
Volume of bottom of cylinder = Volume of entire cylinder - Volume of top of cylinder.
 
        
             
        
        
        
I think it's B. not sure though u should wait. till someone else answer to see if I am right
        
             
        
        
        
Hello here is a solution:
 
        
        
        
Answer:
c = 4
Step-by-step explanation:
5/10 simplifies to 1/2
what over 8 simplifies to 1/2? 4/8 does
so c = 4
 
        
             
        
        
        
X2-1 I think that's the answer because there's 1 less, 1 take away the x and squared!! hard to explain but that's how I thought about it