Answer:
12.6
Step-by-step explanation:
Circumference is πd. So...
(3.14*4)
12.56
12.6
Hope this helps and have a nice day ~(^_^)~
 
        
             
        
        
        
The formula for finding the volume of a sphere is 
If 40mm is the radius of the sphere, the volume will be about  mm.
mm.
 
        
             
        
        
        
Acute would be less than 90 degrees, obtuse is greater than 90 degrees and right is 90 degrees
        
             
        
        
        
Answer: Scale Factor = 1/4
Step-by-step explanation:
The base of triangle X has a length of 12, and the base of triangle x' has a length of 3. Therefore, the scale factor is 1/4, because 12 x 1/4 = 3.
 
        
             
        
        
        
-1/2(-4/5)
Multiply the numerators by each other and do the same for the denominators.
That is: 
-1(-4)=4
And 2*5=10
Now we have 4/10
Divide the numerator and the denominator by 2 to get 2/5 which is the simplest form. 
Hope this helped.