Answer:
V = 2143.57
Step-by-step explanation:
To find the volume of a sphere you need to use this formula:

r = radius
Solve:
You need the radius from the diameter. Divide 16/2 which is
8.

V = 2143.57
 
        
                    
             
        
        
        
223
-119
104 
In stead of doing 3-9 and 2-1 do 23-19 then 2-1
        
             
        
        
        
X= 7/93 or roughly 0.07526... 
        
             
        
        
        
Answer:
y = -2x + 1. 
Step-by-step explanation:
2y = x - 1
y = 1/2y - 1/2
If line X is perpendicular to line Y (the line where y = 1/2y - 1/2), the slope will be the negative reciprocal of line Y. That means that there will be a negative sign instead of positive, and the 1/2 will be flipped to become 2/1, which is 2. 
So, the slope will be -2. 
We now have y = -2x + c. 
To find c, simply put in -1 for x and 3 for y. 
3 = -2 * -1 + c
c + 2 * 1 = 3
c + 2 = 3
 c = 1
So, the equation of the line is y = -2x + 1. 
Hope this helps!